EM WAVES

Question 1

Who discovered Electromagnetism?

Answer 1

James Clerk Maxwell

Question 2

Who proved and justified the existence of Electromagnetic waves?

Answer 2

Heinrich Hertz

Question 3

Who pioneered the use of radio waves and use of wireless telegraphy?

Answer 3

Gugliemo Marconi

Question 4

What is the speed of light equivalent to?

Answer 4

3.0 x 10^8 m/s

Question 5

What are the two kinds of waves?

Answer 5

TRANSVERSE and LONGITUDINAL

Question 6

What are the units of wavelengths?

Answer 6

Nm and m

Question 7

What are the units of frequency ?

Answer 7

Hz and /s

Question 8

What is the sequence of the EM spectrum?

Answer 8

Radiowaves, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays

Question 9

Used in communication in civilian aircraft

Answer 9

Radiowaves | VHF

Question 10

Used for police radio communications and some Tv transmission

Answer 10

Radiowaves | UHF

Question 11

The uses of the EM wave are : radio devices, EM radios etc.

Answer 11

Radiowaves

Question 12

Used in National and Local Security Applications

Answer 12

Microwaves

Question 13

RADAR acronym meaning

Answer 13

Radio Detection and Ranging

Question 14

Examples of this wave is Speedtracking.

Answer 14

Microwaves

Question 15

Example of this wave are Early Warning Radar, Missile Guidance System and Weather Monitoring.

Answer 15

Microwaves

Question 16

values of Microwaves’ frequencies

Answer 16

300 mHz to 300 GHz

Question 17

Detected in Thermal Scanners, Night vision cameras and Tv remotes.

Answer 17

Infrared

Question 18

Frequency value of Infrared waves?

Answer 18

10^-3 to 10-1 m

Question 19

Spectrum Of Color ?

Answer 19

Red, Orange, Yellow, Green, Blue, Violet

Question 20

Optical Spectrum

Answer 20

Visible Light

Question 21

Type of UV rays that causes wrinkles and aging

Answer 21

UVA

Question 22

Type of UV rays that cause skin cancer/melanoma

Answer 22

UVB

Question 23

Frequency of UV rays?

Answer 23

300THz

Question 24

EM Wave that has the longest wavelength?

Answer 24

Radiowaves

Question 25

EM Wave that has the highest frequency?

Answer 25

Gamma Rays

Question 26

Can Radiowaves pass through objects?

Answer 26

No wtf

Question 27

Can X-Rays pass thru objects

Answer 27

Yes but pp of guys cant be exposed to it

Question 28

Used to study structure of crystals and solids

Answer 28

X-Rays

Question 29

2 Ways Gamma Rays can get thru affected area | HINT : ERBT and IR or BT

Answer 29

External Radiation Beam Therapy and Internal Radiation / Brachytherapy

Question 30

Formula of the Energy of an EM

Answer 30

E=hf

Question 31

Planck's constant

Answer 31

6.626176 x 10^-34 Js