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In the figure an air less of raddi of cu...

In the figure an air less of raddi of curvature 10 cm `(R_1 = R_2 = 10 cm)` is cut in a cylinder of glass (n = 1.5). The focal length and the nature of the lens is

A

15 cm, concave

B

15 cm, convex

C

`oo`, neither concave nor convex

D

0, concave

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The correct Answer is:
A
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TARGET PUBLICATION-RAY OPTICS-COMPETITIVE THINKING
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  3. In the figure an air less of raddi of curvature 10 cm (R1 = R2 = 10 cm...

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