Question

. A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm

from the mirror.(a) Write the type of mirror.(b) Find the distance of the image from the object.(c) What

is the focal length of the mirror?​

Answer 1

Answer:

(i) As magnification is negative, the image formed is real. Hence, it is a concave mirror.

(ii) m=-v/u= -1 u = v= -50 cm Distance of the image from the object v-u=-50-(-50)=0 cm

(iii) By using mirror formula : 1/f=1/v+1/u =1/(-50)+1/(-50)=-1/(-50)=-1/25 f=-25 cm