# Optics physics

## Homework Statement

1. When a wave is reflected from a mirror, there is no change in its
a) Amplitude b) Frequency c) Velocity d) All

## The Attempt at a Solution

I think frequency changes,not sure

## Answers and Replies

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i guess all

tip 1: If the frequency changes, the color of the light changes.
tip 2: the speed of light, c, is constant under all circumstances.
tip 3: $$\lambda = \frac{c}{f}$$

tip 1: If the frequency changes, the color of the light changes.
tip 2: the speed of light, c, is constant under all circumstances.
tip 3: $$\lambda = \frac{c}{f}$$
c is not constant in all circumstances.
it remains same in same medium
and it is c only in vaccum not in air

ehild
Homework Helper
tip 2: the speed of light, c, is constant under all circumstances.
tip 3: $$\lambda = \frac{c}{f}$$
The speed of light depends of the medium. The ratio c/v is called the refractive index. The wavelenght is v/f.

ehild