Question

An object of height 7 cm is kept at adistance of 25 cm in front of aconcavr mirror .The focal length of the mirror is 15 cm .At distance from the mirror should ascreenwhat

Answer 1

image have +sign...+9.4cm

Answer 2

Heya

Mirror formula is 1/f = 1/v+1/u

1/-15 = 1/v + 1/-25

-1/15 + 1/25 = 1/v

(-5+3)/75 = 1/v

-2/75=1/v

v = -75/2 = -37.5cm

The screen should be placed at a distance of 37.5cm from the mirror to obtain a clear image.