Math, asked by hafizaanjumknl090806, 5 hours ago

A convex and concave lenses of focal length is 20 CM the focal length of the contact lens is?​

Answers

Answered by GιяℓуSσυℓ
1

Answer:

Focal length of the concave lens = 20 cm. As we all know that the focal length of the concave lens is always negative as it behaves as a diverging lens because it causes the light ray to bend away from the axis. Therefore, f2 = -20 cm.

Answered by tejas3539
0

Answer:

10 Cms long due to reflection between 10 cm

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