A light year is a unit of ...? Mcqs

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A light year is a unit of ...?

(A) Time
(B) Energy

(C) distance
(D) Mass

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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

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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

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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

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

(A) potential energy
(B) chemical energy

(C) heat energy
(D) electrical energy

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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

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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’.

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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

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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

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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

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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

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

(A) Natural light
(B) Bioluminescence

(C) Illumination
(D) Mimicry

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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

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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

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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

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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

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