Question

A spherical mirror produces a magnification of -1, on a screen placed at a distance of 50 cm, from the mirror.
(i) Write the type of the mirror.
(ii) Find the distance of the image from the object.
(iii) What is the focal length of the mirror?

Answer 1

Answer:

i). convex mirror

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Answer 2

Explanation:

thus mirror is concave............................

by applying magnification formula once again........

m=f÷f-u

-1=f÷f-(-50)

-1=f÷f+50

-1(f+50)=f

-f-50=f

-50=f+f

-50=2f

f=-50÷2

f=-25

therefore, focal length of given spherical mirror is -25cm.

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hope so it's correct........