Physics, asked by soumodeepnandi2683, 11 months ago

a convex lens of focal length 25 cm is placed in contact with a concave lens of focal length 20 cm find the focal length of the combination of lenses power of combination what is the nature of the combination

Answers

Answered by abhijeetjena2020

2

Answer:

Explanation:

F1=25 cm

F2=-20 cm

1/F=1/F1 + 1/F2

= 1/25+1/-20

=1/25-1/20

=25-20/25*20

=5/500

=1/100

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