Question

a concave lens of focal length 15 CM forms an image 10cm from the lens at what distance should the object be placed from the lens
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Answer 1

Answer:

Below is ur answer in the image...

:)

.....hope it helps....

Answer 2

Answer:

★★Question:-

A concave lens of focal length 15 cm from an image 10cm from the lens calculate the distance of the object from the lens.

★★Given:-

focal length (F)=-15 cm after sign conventions

Image distance(V)=-10cm

Object distance(U)=?

★★Answer:-

By using formula,

U= -30cm

Explanation: