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Physics > Waves Achieve > Flashcards

Waves Achieve Flashcards

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1
Q

What do all waves transfer?

A

Energy

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2
Q

Define a longitudinal wave.

A

A longitudinal wave is a wave vibrating in the direction of propagation.

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3
Q

Define a transverse wave.

A

A transverse wave is a wave vibrating perpendicular to the direction of propagation.

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4
Q

What type of wave is a sound wave?

A

Longitudinal

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5
Q

.
What type of wave is a water wave?

A

Transverse

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6
Q

.
What type of wave is a gamma ray?

A

Transverse

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7
Q

What is diffraction?

A

Diffraction is when a wave passes an object and bends around it.

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8
Q

When a wave diffracts does its wavelength change?

A

No, wavelength stays constant.

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9
Q

.
When a wave diffracts does its speed change?

A

No, speed stays constant.

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10
Q

Do waves with a long wavelength diffract more or less than short wavelength waves?

A

More

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11
Q

What diffracts more, radio waves or microwaves?

A

Radio waves

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12
Q

What diffracts less, microwaves or infra red?

A

Infra red

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13
Q

What part of the electromagnetic spectrum has a frequency higher than x-rays?

A

Gamma

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14
Q

What part of the electromagnetic spectrum has a longer wavelength than microwaves.

A

Radio (and TV) waves

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15
Q

What part of the electromagnetic spectrum has a longer wavelength than visible light but a frequency higher than microwaves.

A

Infra red

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16
Q

Suggest an application for ultraviolet light.

A

Detect counterfeit currency
Tanning salon
Treat acne

17
Q

Name a detector for radio waves.

A

Arial

18
Q

Name a source of gamma rays.

A

Nuclear waste

19
Q

Describe the speed of gamma rays compared to radio waves.

A

They travel at the same speed

20
Q

What speed does everything travel in the electromagnetic spectrum?

A

3 × 10 8 m/s

21
Q

Calculate the time it takes a radio wave to travel 600 km.

A

2 ms

22
Q

Define refraction of light?

A

The change in speed of light entering a different medium that is more or less dense.

23
Q

A ray of light enters a glass block from air along the normal. What happens to the ray of light?

A

It slows down but keeps travelling in the same direction.

24
Q

A ray of light exits a glass block into air along the normal. What happens to the ray of light?

A

It speeds up but keeps travelling in the same direction.

Physics (8 decks)

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