Question

a student focused the image of a candle flame on a white screen by placing the flame at various distance from a convex lens in noted his observation As given below

find out the focal length ​

Answer 1

Answer:

A student focused the image of a candle flame on a white screen by placing the flame at various distances from a convex lens.

...

S. No. Distance of flame from the lens (cm) Distance of the screen from the lens (cm)

(ii) 40 24

(iii) 30 30

(iv) 24 40

(v) 15 70