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SCIENCE > 2nd Peridocial Exam Reviewer (EM WAVES) > Flashcards

2nd Peridocial Exam Reviewer (EM WAVES) Flashcards

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1
Q

What is the correct flow for radio communication and broadcasting?

A

Microphone, Modulator, Antenna, Demodulator, Amplifier, Speaker

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2
Q

Does tuner produces radio frequency carrier waves?

A

No

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3
Q

How does UV Light exhibit its germicidal effect?

A

UV LIGHT disrupts the reproductive abilities of bacteria and viruses.

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4
Q

How does the wavelength of infrared differ from the wavelength of ultraviolet rays?

A

Longer

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5
Q

Why are grammars rays more dangerous to human than visible light?

A

Gamma rays have greater energy than visible light for penetrating matter.

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6
Q

EM Waves order from shortest to longest wavelength

A

Gamma rays, X-Rays, UV Rays, Visible Light, Infrared, Microwaves, Radio

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7
Q

How can X-radiation be harmful and how it can be a useful diagnostic tool?

A

Overexposure to X-Rays can cause cancer, though in limited doses X-rays can be used for imaging internal body parts.

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8
Q

The speed of an EM Waves is equal to

A

Wavelength times frequency

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9
Q

An EM WAVES with a frequency higher than that of a gamma rays.

A

A Z-ray would have a shorter wavelength than gamma ray.

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10
Q

The fact that you can get sunburned while submerged in water is evidence that water is ____________.

A

Transmits ultraviolet light.

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11
Q

EM WAVES used for RADAR

A

Radio

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12
Q

Waves lie at the ends of the visible spectrum

A

Infrared and Ultraviolet Rays

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13
Q

Waves that are created as a result of vibrations between an electric and magnetic field?

A

Electromagnetic waves

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14
Q

Which property spells the difference between infrared and ultraviolet radiation?

A

Wavelength

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15
Q

In a vacuum, all EM WAVES have the same ________.

A

Speed

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16
Q

Which WAVES that tans our skin?

A

Ultraviolet

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17
Q

EM WAVES used to cook food, predict the weather and for communications?

A

Microwaves

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18
Q

Gamma rays have the highest frequencies and radio waves have the lowest frequencies. what does this statement imply?

A

Gamma rays have the most energy and radio waves have very little energy.

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19
Q

In a vacuum, EM RADIATION of short wavelengths ____________.

A

Travels as fast as radiation of long wavelengths

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20
Q

Which wavelength of the EMR can penetrate human tissue?

A

Gamma

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21
Q

CLASSIFY

A father watching NBS via satellite

A

Microwaves

22
Q

CLASSIFY

Camera autofocusing

A

Infrared

23
Q

CLASSIFY

Using remote controls

A

Infrared

24
Q

CLASSIFY

Treating cancer

A

Gamma

25
Q

CLASSIFY

Using red emergency light on cars

A

Visible Light

26
Q

CLASSIFY

Checking of bank signature

A

UV Light

27
Q

CLASSIFY

Sterilization of water in drinking fountains

A

UV Light

28
Q

CLASSIFY

Diagnosis of bone structure

A

X-ray

29
Q

CLASSIFY

Using optic fibers in wiring

A

Visible Light

30
Q

CLASSIFY

A policeman officer uses RADAR for Speed Control

A

Radio

31
Q

CLASSIFY

Used to inspect welded joints in industry

A

X-ray

32
Q

CLASSIFY

A dentist obtaining an image of the root of a tooth

A

X-ray

33
Q

CLASSIFY

Cooking food

A

Microwaves

34
Q

CLASSIFY

Used in phototherapy

A

Visible Light

35
Q

CLASSIFY

Help to produce Vitamin D

A

UV Light

36
Q

They are smaller wavelength than radio waves.

A

Microwaves

37
Q

Also called as HEAT RAYS

A

Infrared

38
Q

When white light passes through prism, it is separate into constituent colors: ROYGBIV

A

Visible Light

39
Q

Sun is the main source of ___________.

A

UV Radiation

40
Q

Who discovered X-ray?

A

Wilhelm Conrad Roentgen

41
Q

Type of X-ray that uses to help doctors look inside the body

A

Long-wavelength X-ray

42
Q

They are shortest wavelength and highest frequency.

A

Gamma Rays

43
Q

They are used in treating cancer called _______.

A

Radiotherapy

44
Q

CLASSIFY

Used for sterilization of drinking water

A

Gamma Rays

45
Q

EM Waves have an electric magnetic field that travels _________ with the magnetic field.

A

Perpendicular

46
Q

EM WAVES order from lowest frequency to highest frequency.

A

Radio,Microwaves, Infrared, Visible Light, UV Light, X-ray, Gamma Ray

47
Q

Em WAVES order from lowest energy to highest energy.

A

Radio,Microwaves, Infrared, Visible Light, UV Light, X-ray, Gamma Ray

48
Q

Lowest frequency, lowest energy and longest wavelength

A

Radio waves

49
Q

Converts sound wave to audio-frequency signal

A

Microphone

50
Q

Extract AF SIGNALS from modulated carrier wave

A

Demodulator

SCIENCE (3 decks)

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