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A convex lens of focal length 40cm is placed in contact with a concave lens of focal length 25cm. What is the power of the combination.?
Verified Answer
A convex lens of focal length 40cm is placed in contact with a concave...
Convex lens 

f = 40 cm ...

P = 100 / f(in cm) = 100 / 40 = 10 / 4 = + 2.5 D...

Concave lens 

f = 25 cm ....

P = 100 / f(in cm) = 100 / 25 = - 4 D ....

As , we know that total power is equal to the algebraic sum ...

---> Power of combination = +2.5 D + (-4 D) = -1.5 D
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A convex lens of focal length 40cm is placed in contact with a concave lens of focal length 25cm. What is the power of the combination.?
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A convex lens of focal length 40cm is placed in contact with a concave lens of focal length 25cm. What is the power of the combination.? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about A convex lens of focal length 40cm is placed in contact with a concave lens of focal length 25cm. What is the power of the combination.? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A convex lens of focal length 40cm is placed in contact with a concave lens of focal length 25cm. What is the power of the combination.?.
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