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Science > LOW FREQUENCY EM WAVES > Flashcards

LOW FREQUENCY EM WAVES Flashcards

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1
Q

Extremely high frequency radio waves

A

MICROWAVES

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2
Q

A microwave oven uses a _

A

magnetron

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3
Q

Converts electrical energy into microwave radiation

A

Magnetron

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4
Q

_ also transmit microwaves

A

Stars

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5
Q

Can be reflected and absorb

A

MICROWAVES

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6
Q

Food absorbs but metallic objects reflect them

A

MICROWAVES

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7
Q

_ objects should not be used in a microwave oven

A

Metallic objects

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8
Q

Are designed to resist radiation from microwaves

A

microwave-safe containers

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9
Q

Prolonged exposure to microwaves can cause _

A

Cataract

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10
Q

_ can also affect parts of your brain

A

CELL PHONES

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11
Q

Mobile phones use transmitter chips to produce _

A

MICROWAVES

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12
Q

Have wavelengths between those of microwaves and visible light

A

INFRARED WAVES

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13
Q

Most of the thermal radiation emitted by objects near room temp is _

A

INFRARED WAVES

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14
Q

Instruments that allows you to see infrared waves

A

NIGHT VISION GOGGLES AND INFRARED CAMERAS

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15
Q

Invisible to the naked eye

A

INFRARED WAVES

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16
Q

Major source of infrared radiation

A

THE SUN

17
Q

The amount of infrared radiation emitted by an object depends on the _

A

Object’s temperature

18
Q

Is used to keep food hot, to relieve sore muscles,

A

INFRARED

19
Q

Are lamps are also a source of infrared radiation

A

XENON

20
Q

Can cause damage to the human body, particularly to the eyes and the skin

A

INFRARED RADIATION

21
Q

Enables one to see the physical world

A

VISIBLE LIGHT

22
Q

Main source of light

A

THE SUN

23
Q

Visible light from the _ is one of the raw materials in photosynthesis

A

SUN

24
Q

In the absence of sunlight, _ are used as a source of light

A

LIGHT BULBS

25
Q

EXAMPLE OF VISIBLE LIGHT:

A

Prism

26
Q

Colors that can be seen in prism:

A

THE RAINBOW

27
Q

Separated into its component lights of different wavelengths

A

DISPERSION

28
Q

Is also used in visible lasers

A

VISIBLE LIGHT

29
Q

Light amplification by stimulated emission of radiation

A

LASER

30
Q

Narrow and focused beam of light

A

LASER

31
Q

APPLICATIONS OF LASER:

A

MILITARY, INDUSTRY, MEDICINE

Science (15 decks)

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