Physics, asked by dadaswapnildas, 1 day ago

two thin lenses of power +4D and -2D are in contact. Wharlt is the focal length of the combination ? What is the nature of the lens after resultant focal length ?

Answers

Answered by santuphysics1996

Answer:

50 cm because D=D1+D2 So D= 2 so focal lenth50 cm&lens is convex

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