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Physics > SP5 - Electromagnetic Spectrum > Flashcards

SP5 - Electromagnetic Spectrum Flashcards

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1
Q

What is a spectrum?

A

A range.

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2
Q

What is the electromagnetic spectrum?

A

A range of waves with different wavelengths and frequencies. (Light waves)

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3
Q

What are the names of the waves on the electromagnetic spectrum?

A

Radio waves
Micro-waves
Infra-red
Visible light
Ultra violet
X-rays
Gamma rays

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4
Q

What are the uses of radio waves?

A

TV
Radios
Telecommunications

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5
Q

What are the dangers of radio waves?

A

There are none

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6
Q

What are the uses of micro-waves?

A

Radar
Cooking
Telecommunications

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7
Q

What are the dangers of micro-waves?

A

Burns
Cancer

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8
Q

What are the uses of visible light?

A

To see

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9
Q

What are the dangers of visible light?

A

Eye damage

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10
Q

What are uses of ultraviolet?

A

Discos
Tanning
Counterfeit detecting

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11
Q

What are the dangers of ultraviolet?

A

Skin cancer

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12
Q

What are the uses of x-rays?

A

Medical imagery
Security

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13
Q

What are the dangers of x-rays?

A

Cancer

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14
Q

What are the uses of gamma rays?

A

Cancer treatment
Observing the universe

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15
Q

What are the dangers of gamma rays?

A

Cancer

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16
Q

What are the similarities between all the waves on the electromagnetic spectrum?

A

They all are transverse waves
They all travel at the same speed
They all travel through a vacuum

17
Q

How do x-rays allow doctors the see images inside our bodies?

A

The x-rays penetrate through the body and are absorbed by our bones, which enable doctors to see if our bones are broken or fractured.

18
Q

How are radio waves produced?

A

The transmitter oscillates electrons

19
Q

How are radio waves detected?

A

Radio waves induce oscillations in the receivers.

20
Q

Why does excessive exposure to ultraviolet radiation harm us?

A

The rays damage skin cells, which can lead to cancer or cataracts.

21
Q

Why does excessive exposure to gamma radiation harm us?

A

The radiation can cause DNA damage, which can lead to cancer

22
Q

Why does excessive exposure to micro-waves harm us?

A

The waves cause a heating affect which damages you body cells.

23
Q

Why do Gamma rays do more damage than radio waves?

A

They have a higher frequency.

24
Q

Out of all the waves on the electromagnetic spectrum which has the highest and lowest frequency?

A

Radio waves - lowest
Gamma rays - highest

25
Q

Out of all the waves on the electromagnetic spectrum which has the longest and shortest wavelength?

A

Radio waves - longest
Gamma rays - shortest

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