In the figure, an air lens of radii of curvature is cut in a cylinder of glass . The focal length and the nature of the lens is

a) |
15 , concave |
b) |
15 , convex |

c) |
, neither concave nor convex |
d) |
0, concave |

In the figure, an air lens of radii of curvature is cut in a cylinder of glass . The focal length and the nature of the lens is

a) |
15 , concave |
b) |
15 , convex |

c) |
, neither concave nor convex |
d) |
0, concave |

1 Answer

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