Question

A mirror forms an image on the screen with double the size of the object. What is the image distance?(focal length of the mirror is 60 cm)​

Answer 1

Answer:

-8cm

Explanation:

Image is inverted so magnification ratio should be negative.

Since the object size is double so magnification ratio m=−2

now the object distance from mirror u=−12

So m=−

u

v

−2=−

−12

v

v=−24cm

image is formed at 24 cm from mirror in same direction of object.

Now be know

f

1

=

v

1

+

u

1

f

1

=

−24

1

+

−12

1

f=−8cm

Answer 2

Answer:

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