Question

Object of height 4cm is placed in front of a concave lens of power 10d.find the size of the image. (v=-6; h’=2. 4

Answer 1

Answer:

given

h = 4 cm

u = 15 cm

p = -10 D

we know that

P = 100\f( in cm)

-10 = 100\f

therefore f = -10 cm

1\v - 1\u = 1\f

1\v - 1\15 = 1\-10

v = -6 cm

h'\h = v\u

h' = -6\-15*4

h' = 1.6 cm

therefore object height is 1.6 cm.

Explanation:

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