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# What is it called when waves change speed?

## What is it called when waves change speed?

Waves change speed when they pass across the boundary between two different substances, such as light waves refracting when they pass from air to glass. This causes them to change direction and this effect is called refraction.

When waves bend due to a change in speed?

Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another.

When waves bend around something it is called?

Diffraction The ability of waves to bend around the edge of an obstacle in their path is called diffraction. DIFFRACTION of a wave is the bending or redirection of the travel of the wave when it passes a barrier without changing the medium in which the wave is traveling.

### Why does change in speed of a wave make it?

Follow a single wavecrest; if the wave is entering the medium at an angle, then part of the wavecrest enters the medium first, and starts to slow down, while the other part of the wavecrest is still going fast, and therefore the wavecrest must bend.

How is diffraction related to the bending of waves?

Diffraction is the bending of waves around obstacles and openings. The amount of diffraction increases with increasing wavelength.

How is the speed of a wave affected by refraction?

Refraction, or the bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. In Lesson 2, it was mentioned that the speed of a wave is dependent upon the properties of the medium through which the waves travel. So if the medium (and its properties) is changed, the speed of the waves is changed.

#### Why do parts of wave front travel at different speeds?

Parts of wave front travel at different speed Changes in speed of light as it passes from one medium to another or variations in temperature and densities of same medium cause Refraction