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physics > EM spectrum > Flashcards

EM spectrum Flashcards

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1
Q

the order of the EM spectrum from low frequency to high frequency?

A

radio, micro, infrared, visible, UV, X-rays and gamma rays

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2
Q

what is the order of the EM spectrum in order of increasing wavelength?

A

gamma, x-rays, UV, visible, infrared, micro, radio

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3
Q

red….

A

monkeys in vietnam use xylophones greatly (low frequency-> high frequency)

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4
Q

can EM waves travel through a vacuum?

A

yea

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5
Q

are EM waves transverse or longitudinal?

A

transverse

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6
Q

EM waves travel at what speed?

A

3 x 10 to the power of 8 m/s

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7
Q

what are the uses of radio waves?

A

TV and radio communication and astronomy

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8
Q

what are the uses of microwaves?

A

satellite TV and mobile phones and also heating food

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9
Q

what are the uses of infrared?

A

heat cameras, close- range heating

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10
Q

what are the uses for visible light?

A

vision, photography and optical fibres

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11
Q

what are the uses of UV rays?

A

tanning beds, security marking

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12
Q

different wavelengths of light as different colours from longest wavelength to shortest wavelength?

A

red, orange, yellow, green, blue, indigo, violet

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13
Q

different wavelengths of light as different colours- from highest frequency to lowest frequency

A

violet, indigo, blue, green, yellow, orange, red

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14
Q

uses of X rays?

A

medical screening and security screening

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15
Q

uses of gamma rays?

A

sterilising food and medical equipment

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16
Q

what are the dangers of microwaves?

A

internal heating of body tissue

17
Q

what are the dangers of infrared?

A

skin burns

18
Q

what are the dangers of ultraviolet?

A

damage to surface cells and blindness

19
Q

what are the damages of gamma rays?

A

cancer and mutation of cells

20
Q

what can be used to protect against the effects of infrared radiation?

A

insulating materials

21
Q

what is used as a protective measure to reduce exposure to UV?

A

suncream

22
Q

what can you do to reduce the risk of gamma rays?

A

wear LED clothing

23
Q

how can you avoid the effects of infrared waves?

A

using shiny silvery surfaces such as aluminium

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