Question

an object of height 7 cm is kept at a distance of 25 cm in front of a concave mirror .The focal length of the mirror is 15 cm . At what distance from the mirror should a screen be kept so as to get a clear image ? what will be the size and nature of the image

Answer 1

We use the curved mirror formulae to get the image distance.:

1/f=1/v+1/u

V is object distance and u is image distance.
F is the focal length.

Substituting the values :1/15=1/25+1/u
1/u=1/15-1/25=5-3/75=2/75

U=75/2=37.5cm

We use the object distance and the image distance to get the magnification.

M=37.5/25=×1.5

The image size =1.5×7=10.5cm

The image is real.

Answer 2

Answer:

I Hope it's help you

Explanation:

Answer =37.5 cm And 10.5 cm image is real