1 light year = ...? Mcqs

PPSC Past Papers

Latest MCQs

1 light year = ...?

(A) 9.5×106 km
(B) 9.5×109 km

(C) 9.5×1012 km
(D) 9.5×1018 km

Comments
Latest MCQs

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

(A) Absorbs
(B) Reflects

(C) Deflects
(D) Refracts

Comments
Latest MCQs

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

(A) Diverging Lens
(B) Prim

(C) Cylindrical Lens
(D) Converging Lens

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Reflects
(B) Refracts

(C) Diffracts
(D) Absorbs

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) 225
(B) 230

(C) 245
(D) 250

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Natural light
(B) Bioluminescence

(C) Illumination
(D) Mimicry

Comments
Latest MCQs

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

Comments
Latest MCQs

The primary colors of light are _____...?

(A) 2
(B) 3

(C) 4
(D) 5

Comments
Latest MCQs

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

Comments
Latest MCQs

The light rays used for eliminating bacteria...?

(A) X-rays
(B) infrared rays

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

Comments
Latest MCQs

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

(A) 10 – 20
(B) 20 – 30

(C) 30 – 40
(D) 40 – 50

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

A light year is a unit of ...?

(A) Time
(B) Energy

(C) distance
(D) Mass

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Smaller
(B) Bigger

(C) Darker
(D) Lighter

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Kerosene oil
(B) Paraffin oil

(C) Heavy Fuel oil
(D) Gasoline

Comments
Latest MCQs

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

(A) Reflection
(B) Diffraction

(C) Refraction
(D) Absorption

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Electrolysis
(B) Photolysis

(C) Radiolysis
(D) Thermolysis

Comments
Latest MCQs

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

(A) 3 lead
(B) 4 lead

(C) 7 lead
(D) 2 lead

Comments
Latest MCQs

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

(A) Green
(B) Black

(C) Red
(D) Blue

Comments
Latest MCQs

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

(A) 80
(B) 200

(C) 120
(D) None

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Lens
(B) Prism

(C) Mirror
(D) Grating

Comments
Latest MCQs

Light dependent reaction takes place in ______...?

(A) Stroma
(B) Thylakoid

(C) Cristae
(D) Cisternae

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Saturn
(B) Mars

(C) Neptune
(D) Jupiter

Comments
Latest MCQs

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

(A) Transmission
(B) Reflection

(C) Absorption
(D) Refraction

Comments
Latest MCQs

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

(A) potential energy
(B) chemical energy

(C) heat energy
(D) electrical energy

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Refraction
(B) Reflection

(C) Diffraction
(D) None

Comments
Latest MCQs

Moon light reaches to earth in___________seconds...?

(A) 0.3 seconds
(B) 1.3 seconds

(C) 2.3 seconds
(D) 3.3 seconds

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Smaller
(B) Very Smaller

(C) Bigger
(D) Older

Comments
Latest MCQs

UV light falls in the category of___________...?

(A) Ionizing Radiations
(B) Non Ionizing Radiation

(C) Visible light
(D) None

Comments
Latest MCQs

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

(A) Rod Cells
(B) Cone Cells

(C) Bipolar Cells
(D) Ganglion Cells

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) 1492
(B) 1609

(C) 1212
(D) 1743

Comments
Latest MCQs

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’.

Comments
Latest MCQs

Light travels in a ______...?

(A) Curved Path
(B) Zigzag Pattern

(C) Straight Line
(D) Circular Motion

Comments
Latest MCQs

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

(A) Mercury
(B) Neptune

(C) Venus
(D) None of These

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

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

Comments
Latest MCQs

Sunlight is a Great Source of ____________...?

(A) vitamin C
(B) vitamin D

(C) vitamin E
(D) vitamin K

Comments
Latest MCQs

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

(A) Diverging lens
(B) Converging lens

(C) Cylindrical lens
(D) None

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Hydrolysis
(B) Glycolysis

(C) Photolysis
(D) None of these

Comments
Latest MCQs

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

Comments
Latest MCQs

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

(A) Sitting position
(B) Standing Position

(C) Lying Position
(D) None of these

Comments

MCQs Categories


Best of Luck

From ShineGk.com

Share our website's link