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Free Online Mock Physics Multiple Choice Test on Opticsray

Sub Category : Opticsray

Test : 1

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1)	A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the plane mirror should be (1) Convergent (2) Divergent (3) Parallel (4) None of these
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2)
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3)	A plane mirror is approaching you at a speed of 10 cm/sec. You can see your image in it. At what speed will your image approach you? (1) 20 cm/sec (2) 15 cm/sec (3) 10 cm/sec (4) cm/sec
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4)	A convex mirror has a focal length f. A real object placed at a distance f in front of it from the pole produces an image at (1) f/2 (2) Infinity (3) f (4) 2f
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5)	The ratio of the refractive index to red light to that of blue light in air is (1) Less than unity (2) Equal to unity (3) Greater than unity (4) None of these
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