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ago in Physics by (267 points)
An object of 3 cm in length is placed at a distance of 20 cm infront of a convex mirror of radius of curvature 30 cm find the position, nature and size of the image

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2 Answers

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ago by (110 points)

Given, a convex mirror,

u = -20 cm ; f = 30cm

By mirror formula, 1/f = 1/v + 1/u, 

we get v = +12 cm

Height of object = 3 cm

Let height of image = x

-v/u = x/3

-12/20 = x/3

x = 9/5

Therefore, position of object is 12 cm (behind the mirror)

Nature of object is virtual

Size of object = 9/5 cm

This solution is strictly for practice purposes, do not use it during examinations.

0 votes
ago by (160 points)

The upper answer is correct

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