Em Waves

Question 1

Electromagnetic waves are produced by?

Answer 1

Accelerating charged particles

Question 2

The interplay of changing electric and magnetic fields leads to the production of?

Answer 2

Electromagnetic waves

Question 3

What kind of waves are electromagnetic waves?

Answer 3

Transverse waves

Question 4

Electromagnetic waves are produces by?

Answer 4

Accelerated or oscillating charge

Question 5

Electromagnetic waves do not require any ?

Answer 5

material or medium for propagation

Question 6

They travel in free space at the speed of ?

Answer 6

3×10^8m/s

Question 7

I’m 1862 who predicted the existence of electromagnetic waves?

Answer 7

Scottish physicist James Clerk Maxwell

Question 8

In 1887, throught the efforts of? waves (other than light) were observed to exist

Answer 8

German physicist Heinrich Hertz

Question 9

Who is considered the Father of Electromagnetic Theory?

Answer 9

James Clerk Maxwell (1831-1879)

Question 10

If the wavelength decreases the frequency?

Answer 10

Increases

Question 11

Wavelength and frequency are?

Answer 11

Inversely proportional to each other

Question 12

What do you call the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies?

Answer 12

EM spectrum

Question 13

It is the longest of all electromagnetic waves

Answer 13

Radio waves

Question 14

Radio Wave, Microwave, infrared, Visible Light ( Ionizing or Non)

Answer 14

Non ionizing

Question 15

Ultraviolet, X-rays, Gamma rays (Ionizing or Non)

Answer 15

Non Ionizing

Question 16

It is an acronym for Radio Detection and ranging.

Answer 16

Radar

Question 17

Who discovered Radio Waves?

Answer 17

Heinrich Hertz (1877)

Question 18

It is primarily used for communication

Answer 18

Radio Waves

Question 19

Who credited for discovering microwave?

Answer 19

James Clerk Maxwell 1864

Question 20

It is high frequency radio waves mainly used for communication especially from 2 to 40 GHz

Answer 20

Microwaves

Question 21

It literally means “below red”

Answer 21

Infrared

Question 22

It has a lower frequency than the red part of visible light

Answer 22

infrared radiation

Question 23

Who discovered infrared waves?

Answer 23

Sir William Herschel, a British astronomer (1800)

Question 24

It cannot be seen by the naked eye but it can be felt as heat

Answer 24

Infrared Radiation

Question 25

It is the only one who can be seen by the naked eye

Answer 25

Visible Light

Question 26

Who discovered Visible Light?

Answer 26

Isaac Newton

Question 27

The sequence of colors of visible light from longest to shortest wavelength may be remembered through the acronym ?

Answer 27

ROYGBIV: RED ORANGE YELLOW GREEN BLUE INDIGO VIOLET

Question 28

One source of visible light?

Answer 28

Laser

Question 29

What is an acronym for light amplication by stimulated emission of radiation ?

Answer 29

Laser

Question 30

Who discovered UV? (Ultraviolet Radiation)

Answer 30

Johann Wilhelm Ritter

Question 31

Three kinds of UV rays:

Answer 31

UVA, UVB and UVC

Question 32

What is the major source of UV rays?

Answer 32

Sun

Question 33

It is sometimes called "Roentgen ray"

Answer 33

X-ray

Question 34

Who discovered X-ray ?

Answer 34

German physicist Wilhelm Conrad Roentgen

Question 35

It have lower energy and can penetrate soft substance such as flesh and bones

Answer 35

Soft X-rays

Question 36

Have higher energy and more penetrating and used mainly in industries

Answer 36

Hard x-rays

Question 37

It is highly penetrating because of their very short wavelengths

Answer 37

Gamma rays

Question 38

Who discovered Gamma rays?

Answer 38

Paul Villard a French chemist and physicist (1900)