Question

55. An object is placed at a distance of 30 cm
20 cm. The image is formed at a distance of
in front of a concave mirror of focal length
​

Answer 1

Answer:

ans:(A) d a e b c

Initially proper sign is assigned to object distance and the image distance according to the sign convention.The values of u and v are substituted in the mirror formula

f

1

=

u

1

+

u

1

. The sign of f indicates whetherthe mirror used is convex or concave.