Question

An object is placed at 40 cm from a concave mirror of radius of curvature 50 cm. Find the image distance. What is the nature of the image?
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Answer 1

Answer :

• Image distance is -0.015cm

Given :

• An object is placed at 40cm from a concave mirror of radius of curvature 50cm

To find :

• Image distance
• What is the nature of the image

Solution :

Given,

• R = 50cm

↦ R = 50

↦ t = 50/2

↦ t = 25

We know that

• 1/n + 1/v = 1/d

Where,

• n = -40
• t = -25

↦ 1/n + 1/v = 1/d

↦ 1/-40 + 1/v = 1/-25

↦ 1/v = 1/40 - 1/25

↦ 25 - 40 / 1000

↦ -15/1000

↦ -0.015 cm

Image distance is -0.015cm.

The Image is formed in front of the mirror.