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Science > Practical Applications Of The Different Regions of EM Waves > Flashcards

Practical Applications Of The Different Regions of EM Waves Flashcards

1
Q

It transforms AF signal and RF carrier wave to a modulated carrier wave.

A

Modulator

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2
Q

It converts sound wave to audio - frequency signal.

A

Microphone

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3
Q

It magnifies or increases energy of modulated carrier wave.

A

Amplifier

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4
Q

It produces radio frequency carrier wave.

A

Radio Frequency Oscillator

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5
Q

It converts AF signal to sound energy.

A

Speaker

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6
Q

It extracts AF signal from modulated carrier wave.

A

Demodulator

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7
Q

It transmits and receives radio wave.

A

Antenna

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8
Q

It selects the frequency of a station desired.

A

Tuner

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9
Q

They have the longest wavelength among the EM Waves and have the fewest frequency and energy at the same time. Therefore it is used to transmit in radio communications and broadcasting.

A

Radio Waves

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10
Q

They have higher frequencies compared to radio waves, which makes it to be used in satellite communications.

A

Microwaves

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11
Q

Unlike radio waves, they are used to transmit signals overseas.

A

Microwaves

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12
Q

It is used to locate, track, recognize or detect objects within a range.

A

RADAR or radio detection and ranging

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13
Q

It is the use of light in medical treatment of a variety of ailments

A

Phototherapy

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14
Q

These are long, thin strands about the diameter of a human hair drawn glass. These strands are arranged in bundles called optical cables which are used in communications.

A

Fiber Optics or Optical Fibers

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15
Q

They are best known to come from the sun, but many are afraid of it.

A

Ultraviolet Rays

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16
Q

They can penetrate the flesh but not the bones.

A

Long-wavelength X-rays

17
Q

They are used in X-ray photography to help doctors look inside the body.

A

Long-wavelength X-rays

18
Q

They are so strong that they can kill living cells, which is why they are used to treat cancer through the process of Radiotherapy.

A

Gamma rays

19
Q

Electromagnetic waves are ______ waves

A

transverse

20
Q

Which section of the electromagnetic spectrum is absorbed from sunlight by the ozone layer?

A

Ultraviolet

21
Q

Which of the following is the correct order of electromagnetic radiation with increasing frequency?

A

Radio Waves, IR Radiation, Visible light, UV Radiation, X-rays

22
Q

Which of the following is an example of phototherapy?

A

Fluorescent Lamp

23
Q

___ are long, thin strands about the diameter of a human hair-drawn glass.

A

Fiber Optics

Science (11 decks)

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