Question

AN OBJECT IS PLACED 15 CM FROM A CONVEX MIRROR OF RADIUS OF CURVATURE 90 CM. CLACULATE POSITION OF THE IMAGE AND ITS MAGNIFICATION.

Answer 1

Answer:

radius of curvature = 90 cm

focal length = r/2 = +45 cm(since it is on the direction on the incident light)

object distance, u = - 15 cm (since it is on the opposite direction of the incident light)

we have to find v= ?

using mirror formula we get ,

1/v + 1/u = 1/f

so 1/ v = 1/f - 1/u

1/v = 1/ 45 - (1/-15) = 1/45 + 1/15 = 4/45

so v =45 / 4 cm

therefore image distance = 45 / 4 cm (positive sice it is in the direction of incident light)