Question

An object of height 5cm is placed at a distance of 1cm from a convex mirror of focal length 15cm. find the nature, position and size of the image​

Answer 1

Answer :

Height of object = 5cm

Distance of object = 1cm

Focal length = 15cm

Type of mirror : Convex

We have to find position, nature and size of image$.$

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

✪ Position of image :

➝ 1/u + 1/v = 1/f

➝ 1/(-1) + 1/v = 1/15

➝ 1/v = 1/15 + 1

➝ 1/v = (1 + 15)/15

➝ v = 15/16

➝ v = 0.94cm

✪ Size of image :

➝ m = -v/u = h'/h

➝ -0.94/-1 = h'/5

➝ h' = 0.94 × 5

➝ h' = 4.7cm

✪ Nature of image :

• Virtual
• Erect
• Small

God Bless ☃

Answer 2

Answer:

Height of object = 5cm

Distance of object = 1cm

Focal length = 15cm

Type of mirror : Convex

We have to find position, nature and size of image..

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

✪ Position of image :

➝ 1/u + 1/v = 1/f

➝ 1/(-1) + 1/v = 1/15

➝ 1/v = 1/15 + 1

➝ 1/v = (1 + 15)/15

➝ v = 15/16

➝ v = 0.94cm

✪ Size of image :

➝ m = -v/u = h'/h

➝ -0.94/-1 = h'/5

➝ h' = 0.94 × 5

➝ h' = 4.7cm

✪ Nature of image :

Virtual

Erect

Small

God Bless ☃