Module 2.1 Lesson 2: The Application of Electromagnetic Spectrum

Question 1

Uses any radio waves to send signals from the Internet server to any gadget.

Answer 1

Wi-fi

Question 2

Longest wavelengths in the EM Spectrum.

Answer 2

Radio waves

Question 3

Have the lowest energy and frequency

Answer 3

Radio waves

Question 4

Used in transmission of sounds in electronics. It can also travel in long distances.

Answer 4

Radio waves

Question 5

Shorter than the Radio waves

Answer 5

Microwaves

Question 6

Used in weather forecasting

Answer 6

Microwave Doppler Radars

Question 7

Navigation system of ships and aircrafts.

Answer 7

Microwaves

Question 8

All bodies release (blank) because every object has thermal energy.

Answer 8

Infrared radiation

Question 9

Lies between the visible light and microwave region of the EM Spectrum.

Answer 9

Infrared waves

Question 10

Used in short-range communications.

Answer 10

Infrared waves

Question 11

The only EM wave that can be perceived by our eyes.

Answer 11

Visible Light

Question 12

Composed of the same colors in the rainbow.

Answer 12

Visible Light

Question 13

When electrons in the atoms becomes too excited, the can be what?

Answer 13

Luminous

Question 14

Shorter than the visible light.

Answer 14

Ultraviolet waves

Question 15

One of its uses is to detect counterfeited money.

Answer 15

Ultraviolet waves

Question 16

A more energetic region of the EM Spectrum.

Answer 16

X-Rays

Question 17

Discovered by Wilhelm Roentgen

Answer 17

X-Rays

Question 18

Can pass through soft tissues except high-density materials such as the bones.

Answer 18

X-Rays

Question 19

Shortest wavelength

Answer 19

Gamma Rays

Question 20

Have the highest energy and frequency

Answer 20

Gamma Rays

Question 21

Emitted during radioactive decay

Answer 21

Gamma Rays

Question 22

Most penetrating among all the EM waves.

Answer 22

Gamma Rays

Question 23

Speed of the EM waves

Answer 23

300,000,000 m/s

Question 24

Long wavelength

Answer 24

Low frequency and energy

Question 25

Short wavelength

Answer 25

High frequency and energy