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Light MCQ question and answer with solution | Physics Gk MCQs

Learn Light MCQ Questions and answers with easy and logical explanations in Physics Gk . Light MCQ question provides all type of technical mcq questions which is important for SSC-CGL, UPPSC, NDA, CDS and all govt examinations Page-8 section-3

Each section contains 100 MCQs on Light .
71
The speed of light is maximum in which of the following mediums?
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Answer & Solution
Answer: Option B
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72
When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is
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Answer & Solution
Answer: Option B
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73
Absolute refractive index of diamond is . . . . . . . .
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Answer & Solution
Answer: Option B
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74
The focal length of the objective lens of a telescope is 50 cm. If the magnification of the telescope is 25, then the focal length of the eyepiece is
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Answer & Solution
Answer: Option C
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75
In the absence of the earth's atmosphere, sky would appear
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Answer: Option D
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76
A concave mirror is placed in front of the sun in such a way that the rays of the sun converge at a point 5 m away on the main axis of the mirror. Now if a candle 3 m long is placed at a distance of 10 m on the main axis of the mirror, how far will the image of the candle will be formed?
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Answer: Option C
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77
The terminal colour bands of the rainbow are
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Answer: Option D
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78
Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of the water.
Reason (R): A light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.
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Answer: Option C
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79
A defect of vision in which the points in one plane of an object appear infocus while those in another plane are out of focus is called
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Answer: Option B
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80
The focal length of a convex lens is 25 cm. Calculate its power.
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Answer: Option D
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