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When seven spectral colours passes through a glass block from air, then which one of the following statements is correct.

(a) In the glass block, speed of blue light> speed of yellow light.

(b) In the glass block, speed of green light> speed of orange light.

(c) In the glass block, speed of violet light > speed of red light.

(d) In the glass block, speed of orange light> speed of indigo light.

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Best answer

Correct answer is (d) In the glass block, speed of orange light> speed of indigo light.

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