Refraction and Diffraction Flashcards by Lucy Welch

Q

Define refracted

A

This means they go through a new material but change direction

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Q

Define diffracted

A

This means the waves ‘bend round’ obstacles, causing the waves to spread out

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Q

Waves diffract when…

A

they pass through a gap or pass an obstacle

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Q

Diffraction:

The narrower the gap…

A

the longer the wavelength, the more the wave spreads out

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Q

Waves refract when…

A

a wave crosses a boundary between two substances

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Q

Refraction:

If a wave hits a boundary straight on…

A

it carries on in the same direction

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Q

Refraction:

If a wave hits a boundary at an angle…

A

the wave changes direction

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