Ray Optics and Optical Instruments

Question: The focal lengths for violet, green and red light rays are ${{f}_{V}},{{f}_{G}}$and ${{f}_{R}}$ respectively. Which of the following is the true relationship

1) ${{f}_{R}}<{{f}_{G}}<{{f}_{V}}$

2) ${{f}_{V}}<{{f}_{G}}<{{f}_{R}}$

3) ${{f}_{G}}<{{f}_{R}}<{{f}_{V}}$

4) ${{f}_{G}}<{{f}_{V}}<{{f}_{R}}$

Solution:

Explanation: No Explanation

Refraction at Curved Surface

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