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Refractive Index

Why is the re...

Question

Why is the refractive index of atmosphere different at different altitudes?

A

Because air density changes with altitude

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B

Because speed of light in vacuum changes.

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C

The refractive index of atmosphere at different altitudes doesn't change.

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D

Because of total internal reflection

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Solution

The correct option is A
Because air density changes with altitude

The refractive index of atmosphere is different at different altitudes because the air density changes with altitude.

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