Question

1.Measure the length between the two Candles(Distance between two

separating line is 1cm).​

Answer 1

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Answer 2

Answer:

as the image formed by convex mirror and by the plane mirror coincide the image distance formed by the convex mirror is 4

because , distance of image from plane mirror is 12 and the distance between plane mirror and convex mirror is 8 hence 12−8=4

let f be the focal lenght of the mirror ,

u=−20 ; v=+4

v

1

+

u

1

=

f

1

4

1

−

20

1

= .

f

1

f=5

hence the focal lenght is 5cm

option D is co.

.

.