1 light year = ...? Mcqs

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1 light year = ...?

(A) 9.5×106 km
(B) 9.5×109 km

(C) 9.5×1012 km
(D) 9.5×1018 km

✅ Correct Answer: 9.5×1012 km

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Source: This question is taken from the Everyday Science

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Which term describes the emission of light by a living organism...?

(A) Natural light
(B) Bioluminescence

(C) Illumination
(D) Mimicry

✅ Correct Answer: Bioluminescence

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Source: This question is taken from the Everyday Science

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Which of the following occurs when light passes through a substance unchanged...?

(A) Transmission
(B) Reflection

(C) Absorption
(D) Refraction

✅ Correct Answer: Transmission

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Source: This question is taken from the Everyday Science

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Which of the following phenomena of light are involved in the formation of a rainbow...?

(A) Refraction
(B) Dispersion

(C) Total internal reflection
(D) All of the above

✅ Correct Answer: All of the above

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Source: This question is taken from the Everyday Science

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When the ray of lights strikes on the brick wall, it is...?

(A) Passed through it
(B) Scattered by it

(C) Reflected by it
(D) None

✅ Correct Answer: Reflected by it

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Source: This question is taken from the Everyday Science

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Light travelling in a straight line ______ when it strikes the surface of another medium....?

(A) Reflects
(B) Refracts

(C) Diffracts
(D) Absorbs

✅ Correct Answer: Reflects

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Source: This question is taken from the Everyday Science

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A object that does not produce light but it reflects light that comes from luminous object is called...?

(A) Luminous
(B) Non-luminous

(C) Reflective
(D) Illuminated

✅ Correct Answer: Non-luminous

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If an opaque object is moved further away from the light source, the shadow gets _____...?

(A) Smaller
(B) Bigger

(C) Darker
(D) Lighter

✅ Correct Answer: Smaller

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Source: This question is taken from the Everyday Science

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The light rays used for eliminating bacteria...?

(A) X-rays
(B) infrared rays

(C) microwave radiation
(D) ultra-violet radiation

✅ Correct Answer: ultra-violet radiation

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The Moon is illuminated because it ________ the light from the Sun....?

(A) Absorbs
(B) Reflects

(C) Deflects
(D) Refracts

✅ Correct Answer: Reflects

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Source: This question is taken from the Everyday Science

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The Velocity of light in a diamond is (whereas the refractive index of a diamond with respect to vacuum is 2.5)...?

(A) 5x10^8m/s
(B) 2.5x10^8m/s

(C) 1.2x10^10m/s
(D) 1.2x10^8m/s

✅ Correct Answer: 1.2x10^8m/s

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Which cells are responsible for vision in bright light and coloured vision...?

(A) Rod Cells
(B) Cone Cells

(C) Bipolar Cells
(D) Ganglion Cells

✅ Correct Answer: Cone Cells

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The entire light is reflected into the same denser medium, which is called total...?

(A) External reflection
(B) External refraction

(C) Internal reflection
(D) Internal refraction

✅ Correct Answer: Internal reflection

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An active asteroid is discovered near ________ Orbit for the first time in billion years....?

(A) Saturn
(B) Mars

(C) Neptune
(D) Jupiter

✅ Correct Answer: Jupiter

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The process in which nuclei of heavy elements are broken into lighter nuclei and produce a large amount of heat energy is called...?

(A) Fusion
(B) Geometry

(C) Regales
(D) Fission

✅ Correct Answer: Fission

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When a light ray enters from a denser medium to a rare medium, it bends ______...?

(A) Perpendicular to normal
(B) Parallel to normal

(C) Toward normal
(D) Away from normal

✅ Correct Answer: Away from normal

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Exposure to sunlight helps a person improve his health because ________...?

(A) Resistance power increases
(B) The infrared light kills bacteria in the body

(C) The ultraviolet rays convert skin oil into Vitamin D
(D) The pigment cells in the skin get stimulated and produce a healthy tan

✅ Correct Answer: The ultraviolet rays convert skin oil into Vitamin

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Source: This question is taken from the Everyday Science

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The day and night are formed due to 'Earth' rotation on its axis from...?

(A) North to south
(B) South to North

(C) West to East
(D) East to West

✅ Correct Answer: West to East

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Source: This question is taken from the Everyday Science

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A child rubbed two balloons with a piece of wool. Which of the following happens when the balloons are brought near each other...?

(A) The balloons will attract each other
(B) The balloons will repel each other

(C) The balloons will stick to the child's hair
(D) The balloons will make a loud noise

✅ Correct Answer: The balloons will repel each other

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Sunlight is a Great Source of ____________...?

(A) vitamin C
(B) vitamin D

(C) vitamin E
(D) vitamin K

✅ Correct Answer: vitamin D

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Air, water, sun, land, rocks and light etc is/are an examples of...?

(A) Non-Living Components
(B) Abiotic Factors

(C) Biotic Factors
(D) Both A and B

✅ Correct Answer: Both A and B

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When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________...?

(A) Visible
(B) Transparent

(C) Invisible
(D) opaque

✅ Correct Answer: Visible

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About the requirement of light for germination...?

(A) Some seeds germinate in dark whereas some require light
(B) All seeds germinate in dark

(C) All seeds germinate in light
(D) None

✅ Correct Answer: Some seeds germinate in dark whereas some require light

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Source: This question is taken from the Everyday Science

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The Time taken for sunlight to reach the Earth is___________...?

(A) 700 sec
(B) 8hrs 20 mins

(C) 8 mins 20 sec
(D) 8 mins

✅ Correct Answer: 8 mins 20 sec

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Source: This question is taken from the Everyday Science

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A man presses more weight on earth at___...?

(A) Sitting position
(B) Standing Position

(C) Lying Position
(D) None of these

✅ Correct Answer: Standing Position

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Source: This question is taken from the Everyday Science

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The phenomenon of dispersion light can be observed experimentally by passing a white light through ____...?

(A) Lens
(B) Prism

(C) Mirror
(D) Grating

✅ Correct Answer: Prism

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Electron has a much shorter wavelength than visible light, and this allows electron microscopes to produce _____ images....?

(A) Lower-resolution
(B) Higher-magnification

(C) Equal-resolution
(D) Higher-resolution

✅ Correct Answer: Higher-resolution

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According to Big Bang Theory, the Universe began about __________ billion years ago....?

(A) 10 – 20
(B) 20 – 30

(C) 30 – 40
(D) 40 – 50

✅ Correct Answer: 10 – 20

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Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation...?

(A) ‘Higgs boson particles’ were detected.
(B) Gravitational waves’ were detected.

(C) Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
(D) It enabled the scientists to understand ‘singularity’.

✅ Correct Answer: Gravitational waves’ were detected.

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Moon light reaches to earth in___________seconds...?

(A) 0.3 seconds
(B) 1.3 seconds

(C) 2.3 seconds
(D) 3.3 seconds

✅ Correct Answer: 1.3 seconds

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If the green leaves are placed under red light, their color will become________...?

(A) Green
(B) Black

(C) Red
(D) Blue

✅ Correct Answer: Black

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Splitting of water in presence of light called...?

(A) Hydrolysis
(B) Glycolysis

(C) Photolysis
(D) None of these

✅ Correct Answer: Photolysis

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Source: This question is taken from the Everyday Science

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Light dependent reaction takes place in ______...?

(A) Stroma
(B) Thylakoid

(C) Cristae
(D) Cisternae

✅ Correct Answer: Thylakoid

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Why normal rain is slightly acidic...?

(A) due to presence of dust in air
(B) carbon dioxide and water in clouds react to form carbonic acid

(C) Ozone depletion
(D) All of these

✅ Correct Answer: carbon dioxide and water in clouds react to form carbonic acid

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The lens which refract the parallel rays of light are called ____...?

(A) Diverging Lens
(B) Prim

(C) Cylindrical Lens
(D) Converging Lens

✅ Correct Answer: Converging Lens

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Source: This question is taken from the Everyday Science

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In what year did Galileo first use an optical telescope to study the moon...?

(A) 1492
(B) 1609

(C) 1212
(D) 1743

✅ Correct Answer: 1609

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When light passes through prism _____ occurs to form spectrum....?

(A) Refraction
(B) Reflection

(C) Diffraction
(D) None

✅ Correct Answer: Refraction

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When a person enters a dark room from bright light he is not able to see clearly for a little while because the...?

(A) Eye is unable to adjust itself immediately
(B) Retina becomes insensitive momentarily

(C) Iris is unable to dilate the pupil immediately
(D) Distance between the lens and retina take time to adjust

✅ Correct Answer: Iris is unable to dilate the pupil immediately

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What is the date when day and night are equal...?

(A) March 21 and December 24
(B) January 14 and September 23

(C) March 20 and September 23
(D) January 14 and June 22

✅ Correct Answer: March 20 and September 23

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Day and night are the results of__________...?

(A) Earth rotation around its axis
(B) Earth revolution

(C) Earth rotation accompanied with its revolution.
(D) None of these

✅ Correct Answer: Earth rotation around its axis

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Total internal reflection of light is possible when light enters from ____...?

(A) Air to water
(B) Glass to glass

(C) Water to air
(D) Air to glass

✅ Correct Answer: Water to air

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Light reaches us from the Sun is about 8 minutes and from Sirius in about _____...?

(A) 8 minutes
(B) 8 days

(C) 8 months
(D) 8 years

✅ Correct Answer: 8 years

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The point through which a ray of light passes without changing its path is the _____...?

(A) Focal Point
(B) Principal Axis

(C) Optical Centre
(D) Centre of Curvature

✅ Correct Answer: Optical Centre

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Clocks, which moves with the velocities comparable with the velocity of light, run ...?

(A) fast
(B) slow

(C) equal to the velocity of light
(D) with zero velocity

✅ Correct Answer: slow

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The lens which coverage a beam of parallel rays of light are called ____...?

(A) Diverging lens
(B) Converging lens

(C) Cylindrical lens
(D) None

✅ Correct Answer: Diverging lens

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A light year is a unit of ...?

(A) Time
(B) Energy

(C) distance
(D) Mass

✅ Correct Answer: distance

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UV light falls in the category of___________...?

(A) Ionizing Radiations
(B) Non Ionizing Radiation

(C) Visible light
(D) None

✅ Correct Answer: Ionizing Radiations

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A narrow beam of white light passes from air into the glass and is refracted. The wave characteristic remains unchanged in its ______...?

(A) Direction
(B) Speed

(C) Frequency
(D) Wavelength

✅ Correct Answer: Frequency

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Light travels in a ______...?

(A) Curved Path
(B) Zigzag Pattern

(C) Straight Line
(D) Circular Motion

✅ Correct Answer: Straight Line

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Source: This question is taken from the Everyday Science

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The day and night are formed due to 'Earth' rotation on its own axis from...?

(A) North to South
(B) South to North

(C) East to West
(D) West to East

✅ Correct Answer: West to East

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Source: This question is taken from the Everyday Science

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When a parallel beam of light rays strikes a smooth surface like mirrors, it will be reflected as parallel rays of light is called...?

(A) Irregular Reflection
(B) Specular Reflection

(C) Diffused Reflection
(D) Scattered Reflection

✅ Correct Answer: Specular Reflection

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What causes the stars in space to absorb and scatter starlight that resulting in a reduction in their brightness...?

(A) Planets and Moons
(B) Asteroids and Comets

(C) Black Holes and Neutron Stars
(D) Dust and Gas

✅ Correct Answer: Dust and Gas

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When parallel rays of light fall onto rough surface they are reflected in different directions and are scattered is called _____...?

(A) Regular Reflection
(B) Specular Reflection

(C) Diffused Reflection
(D) None

✅ Correct Answer: Diffused Reflection

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Which of the following is mainly used for light patrol engines ...?

(A) Kerosene oil
(B) Paraffin oil

(C) Heavy Fuel oil
(D) Gasoline

✅ Correct Answer: Gasoline

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In the absence of sunlight, the entire food chain would become...?

(A) Active and Thrive
(B) Unaffected and Stable

(C) Slow but Survive
(D) Inactive and Collapse

✅ Correct Answer: Inactive and Collapse

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When light changes in direction when entering one transparent medium to another is known as...?

(A) Reflection
(B) Diffraction

(C) Refraction
(D) Absorption

✅ Correct Answer: Refraction

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Source: This question is taken from the Everyday Science

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Sun revolves around milky way in about _____ million years....?

(A) 225
(B) 230

(C) 245
(D) 250

✅ Correct Answer: 230

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Source: This question is taken from the Everyday Science

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The primary colors of light are _____...?

(A) 2
(B) 3

(C) 4
(D) 5

✅ Correct Answer: 3

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How many light years the earth and sun are away from the center of Milky Way galaxy...?

(A) 27000
(B) 23000

(C) 20000
(D) 25000

✅ Correct Answer: 25000

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A process in which light rays falls on any material object and these rays bounce back is known as...?

(A) Reflection
(B) Refraction

(C) Diffusion
(D) Absorption

✅ Correct Answer: Reflection

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Source: This question is taken from the Everyday Science

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When the moon comes in front of the sun and blocks most of the sunlight from reaching the earth is known as...?

(A) A Solar Eclipse
(B) A Lunar Eclipse

(C) A Venus Eclipse
(D) A Earth Eclipse

✅ Correct Answer: A Solar Eclipse

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The sunlight can reach a depth of___________meters in the ocean...?

(A) 80
(B) 200

(C) 120
(D) None

✅ Correct Answer: 200

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Light Emitting Diode (LED) is a ___ semiconductor device ....?

(A) 3 lead
(B) 4 lead

(C) 7 lead
(D) 2 lead

✅ Correct Answer: 2 lead

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Source: This question is taken from the Everyday Science

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If an Opaque object is moved closer to the light source the shadow gets _______...?

(A) Smaller
(B) Very Smaller

(C) Bigger
(D) Older

✅ Correct Answer: Bigger

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Source: This question is taken from the Everyday Science

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Only planet whose day is longer than its year is__________...?

(A) Mercury
(B) Neptune

(C) Venus
(D) None of These

✅ Correct Answer: Venus

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Magnification of a light microscope is formed by using mixture of the power of the eyepiece and the _____ lens....?

(A) Concave
(B) Convex

(C) Objective
(D) Mirror

✅ Correct Answer: Objective

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In a photocell light energy is converted into...?

(A) potential energy
(B) chemical energy

(C) heat energy
(D) electrical energy

✅ Correct Answer: electrical energy

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The process of splitting water molecules in the presence of light energy is called_________...?

(A) Electrolysis
(B) Photolysis

(C) Radiolysis
(D) Thermolysis

✅ Correct Answer: Photolysis

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Source: This question is taken from the Everyday Science

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An optic piece of curved transparent glass or plastic that refract the light in a specific way is called...?

(A) Prism
(B) Filter

(C) Lens
(D) Mirror

✅ Correct Answer: Lens

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Source: This question is taken from the Everyday Science

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