Physics, asked by Rupaliparul786, 11 months ago

A convex lens of focal length 30 cm and concave lens of focal length is 0.6 CM are placed in contact What is power of combination

KingOMac1: hlllooo??

Rupaliparul786: I don't know .. I get different different answers from different places.. I am confused

Rupaliparul786: Give me your points please

Rupaliparul786: Deepu have u done ?

KingOMac1: bro i think mine is correct but not sure

KingOMac1: so first find the real answer to the question

javedsaif0: The focal lenth of concave is always negative but the focal length of convex is always negative..

javedsaif0: So use p=p1+p2

javedsaif0: Or p=1/f1 +1/f2 but during addition of these focal lengths consider one convex and other concave and negative sign for concave.. this may help u definitely..

javedsaif0: If u r failed to get ur answer just write me a mail on [email protected]

Answers

Answered by javedsaif0

The focal lenth of concave is always negative but the focal length of convex is always negative..

So use p=p1+p2

Or p=1/f1 +1/f2 but during addition of these focal lengths consider one convex and other concave and negative sign for concave.. this may help u definitely..

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