JEE PHYSICS MCQ: RAY OPTICS

1 Medium

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Analyzing +4 | -1

Assertion: Radius of curvature of a convex mirror is

20 \mathrm{~cm}

. If a real object is placed at 10

\mathrm{cm}

from pole of the mirror, image is formed at infinity.

Reason: When object is placed at focus, its image is formed at infinity.

View answer and explanation

Correct option: D

If Assertion is false but Reason is true.

Option D (If Assertion is false but Reason is true) is correct. The assertion is false because the image would not be at infinity, and the reason is true because an object at the focus of a convex mirror forms an image at infinity.

More Questions from RAY OPTICS

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In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium A double convex lens is made of glass which has its refractive index 1,45 for violet rays and 1.50 for red rays. If the focal length for violet ray is

20 \mathrm{~cm}

, the focal length for red ray will be Which light rays undergoes two internal reflection inside a raindrop, which of the rainbow is formed? A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are A dentist has a small mirror of focal length

16 {~mm}

. He views the cavity in the tooth of a patient by holding the mirror at a distance of

8 {~mm}

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