Practical Applications Of The Different Regions of EM Waves

Question 1

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

Answer 1

Modulator

Question 2

It converts sound wave to audio - frequency signal.

Answer 2

Microphone

Question 3

It magnifies or increases energy of modulated carrier wave.

Answer 3

Amplifier

Question 4

It produces radio frequency carrier wave.

Answer 4

Radio Frequency Oscillator

Question 5

It converts AF signal to sound energy.

Answer 5

Speaker

Question 6

It extracts AF signal from modulated carrier wave.

Answer 6

Demodulator

Question 7

It transmits and receives radio wave.

Answer 7

Antenna

Question 8

It selects the frequency of a station desired.

Answer 8

Tuner

Question 9

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.

Answer 9

Radio Waves

Question 10

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

Answer 10

Microwaves

Question 11

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

Answer 11

Microwaves

Question 12

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

Answer 12

RADAR or radio detection and ranging

Question 13

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

Answer 13

Phototherapy

Question 14

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.

Answer 14

Fiber Optics or Optical Fibers

Question 15

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

Answer 15

Ultraviolet Rays

Question 16

They can penetrate the flesh but not the bones.

Answer 16

Long-wavelength X-rays

Question 17

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

Answer 17

Long-wavelength X-rays

Question 18

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

Answer 18

Gamma rays

Question 19

Electromagnetic waves are ______ waves

Answer 19

transverse

Question 20

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

Answer 20

Ultraviolet

Question 21

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

Answer 21

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

Question 22

Which of the following is an example of phototherapy?

Answer 22

Fluorescent Lamp

Question 23

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

Answer 23

Fiber Optics