Chapter 8.3

Question 1

What are low-frequency electromagnetic waves widely used for communication?

Answer 1

Radio Waves

Question 2

What is the division of the electromagnetic spectrum that is used to cook food?

Answer 2

Microwaves

Question 3

What are four uses of microwaves?

Answer 3

Radar, GPS, microwave ovens, satellite communication

Question 4

What are sometimes called heat rays because they transmit heat effectively?

Answer 4

Infrared Rays

Question 5

What is the lowest ultraviolet radiation that is commonly used for blacklights?

Answer 5

UVA

Question 6

What category of ultraviolet often results in sunburn?

Answer 6

UVB

Question 7

What is the most powerful form of radiation that is completely blocked by the ozone layer?

Answer 7

UVC

Question 8

What is the most powerful form of electromagnetic radiation?

Answer 8

Gamma rays

Question 9

What is the process in which the electron will immediately emit two photons and then fall back down to a low energy level?

Answer 9

Stimulated emission

Question 10

What is the term for a laser bean that consists of only one frequency?

Answer 10

Monochromatic

Question 11

What is the use of laser beams to transmit signals through narrow glass cables?

Answer 11

Fiber optics

Question 12

What is a three-dimensional image produced by laser light?

Answer 12

Hologram