Question

convex lens produces a real and inverted image 2.5 times magnified at a distance of 25 cm

from the lens. Calculate focal length of the lens​

Answer 1

Answer:

the focal length will be 7.14 cm

Answer 2

Explanation:

m=-v/u=-2.5=-25/u

u=10cm

1/f=1/v+1/u

=1/25+1/10=2+5/50=7/50 Cm

f=50/7cm