Question

a concave mirror has radius of curvature of 10 cm.the image position ,if the object is placed 7.5 cm in front of mirror​

Answer 1

Given:

Radius of curvature= 10cm

Focal length= 5 cm (half of radius of curvature)

u= 7.5 cm

By mirror formula:

1/v + 1/u= 1/f

1/v-1/7.5= 1/5

1/v= 1/5+ 1/7.5

1/v=  3+2/15 (By LCM)

1/v= 5/15

v= 15/5

v= 3cm

Answer 2

Option C is right answee