A small angled prism of refractive index 1.4 is combined with another small angled prism of refractive index 1.6 to produce dispersion without deviation. If the angle of first prism is 6⁰, then the angle of the second prism is

Options

(a) 8⁰
(b) 6⁰
(c) 4⁰
(d) 2⁰

Correct Answer:

4⁰

Explanation:

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