11 Waves Flashcards

1
Q

What happens in a reflection?

A

the wave changes direction while remaining in the same median

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2
Q

Why does refraction happen?

A

there is a change in wave speed between medians

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3
Q

What type of wave moves faster in a denser material?

A

sound waves

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4
Q

What is intensity?

A

power per unit area, WM(-2)

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5
Q

What is the inverse square law in relation to wave intensity?

A

The wave intensity decreases as the distance from the source increases.

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6
Q

What is the volume of a circle?

A

4 x pie x radius squared

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7
Q

What is diffraction?

A

When a waves curves round an object

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8
Q

What happens when a waves goes through a smaller gap compared to a large one?

A

The waves is more curved and becomes tighter to the object that is went through

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9
Q

What has to be true for diffraction to happen?

A

gap = wavelength (roughly)

This is why light doesn’t refract

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10
Q

List the EM waves from longest wave length to shortest

A

radio
Microwave
Infrared
Visible light
Ultraviolet
X-ray
Gamma

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11
Q
A
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