Question

18. The focal length of a convex mirror is 10 cm. An
object is kept on its principal axis at a distance of
20 cm from pole. Where will the image be form and
will it be real?
[Ans. 6.7 cm behind the mirror, No]​

Answer 1

Answer:

6.66...... cm , the image is virtual and erect ,behind the mirror

Explanation:

Given: f= 10cm

u= -20 cm

v=?

WKT ,

1/v+1/u=1/f

1/v + 1/-20= 1/10

1/v = 1/10+1/20

1/v = (2 + 1)/20

1/v = 3/20

v=20/3cm

or

v= 6.66.......cm

The image distance is positive,so,the image is formed behind the mirror

Answer 2

Answer:

See the attachment of your answer

Explanation:

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