JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

A square wire frame of side

3.0 \mathrm{~cm}

is placed

25 \mathrm{~cm}

away from a concave mirror of focal length

10 \mathrm{~cm}

. The centre of the wire frame is on the axis of the mirror, with its two sides normal to the mirror. The area enclosed by the image of the wire frame is -

View answer and explanation

Correct option: B

4 \mathrm{~cm}^2

Option B (

4 \mathrm{~cm}^2

) is correct because it is the area of the image calculated using the magnification formula for a concave mirror.

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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}

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8 {~mm}

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