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Diameter of plano-convex lens is 6 cm an...

Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is `2 xx 10^(8) m//s,` the focal length of the lens is :

A

7.5cm

B

15cm

C

45cm

D

30cm

Text Solution

Verified by Experts

The correct Answer is:
D
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