Ray Optics and Optical Instruments

Question: ${{f}_{v}}$and ${{f}_{r}}$ are the focal lengths of a convex lens for violet and red light respectively and ${{F}_{v}}$ and ${{F}_{r}}$are the focal lengths of a concave lens for violet and red light respectively, then

1) ${{f}_{v}} {{F}_{r}}$

2) ${{f}_{v}} < {{f}_{R}}$ and ${{F}_{v}} < {{F}_{r}}$

3) ${{f}_{c}} > {{f}_{r}}$ and ${{F}_{v}} > {{F}_{r}}$

4) ${{f}_{v}} > {{f}_{r}}$ and ${{F}_{v}} < {{F}_{r}}$

Solution:

Explanation: No Explanation

Refraction at Curved Surface

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