When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a decrease in the energy carried by the light wave? Justify your answer.

When light travels from a rarer to a denser medium, the speed decrease

1.	When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a decrease in the energy carried by the light wave? Justify your answer.
Answer» No; when light travels from a rarer to denser medium, its frequency remains unchanged. According to quantities theory, the energy of a light beam depends on frequency and not on speed

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When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a decrease in the energy carried by the light wave? Justify your answer.

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