Question

An object is placed at a distance of 10cm from a concave mirror of focal length is 5cm. Find the position nature and size of the image

Answer 1

Answer :

Distance of object = 10cm

Focal length = 5cm

Type of mirror : concave

We have to find position of image$.$

★ Focal length of concave mirror is taken negative and that of convex mirror is taken positive.

Position of image can be calculated by using mirror formula which is given as

• 1/u + 1/v = 1/f

u denotes distance of object

v denotes distance of image

f denotes focal length

➝ 1/u + 1/v = 1/f

➝ 1/(-10) + 1/v = 1/(-5)

➝ 1/v = -1/5 + 1/10

➝ 1/v = (-2+1) / 10

➝ v = -1/10

➝ v = -10 cm

★ Nature and size of image :

• Real
• Inverted
• Same size