Unit 7: EM Spectrum & Technologies

Question 1

Name 7 types of Waves on the EM Spectrum

Answer 1

Radio Waves, Microwaves, Infrared Waves, Visible Light, Ultraviolet Light, X-rays, Gamma Rays

Question 2

Put the 7 types of waves in order from longest wavelength to shortest.

Answer 2

Radio Waves, Microwaves, Infrared Waves, Visible Light, Ultraviolet Light, X-rays, Gamma Rays

Question 3

Put in order from highest frequency to lowest frequency.

Answer 3

Gamma Rays, X-rays, Ultraviolet Light, Visible Light, Infrared Waves, Microwaves, Radio Waves

Question 4

Which type of wave has the highest energy?

Answer 4

Gamma Rays

Question 5

Which type of wave has the longest wavelength?

Answer 5

Radio Waves

Question 6

What is the only type of EM Wave visible to the human eye?

Answer 6

Visible Light

Question 7

What does ROYGBIV stand for?

Answer 7

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 8

Which color has the lowest frequency?

Answer 8

Red

Question 9

Which color has the highest frequency?

Answer 9

Violet

Question 10

Name 1 technology used by each wave. (Radio waves)

Answer 10

TV Broadcast, Communication through Space, Cellphone Signals Carried by Radio Waves, AM & FM Radio Broadcasting, MRIs

Question 11

Name 1 technology used by each wave. (Microwaves)

Answer 11

Radar, Microwave Oven, GPS, Cellphone Communication, Bluetooth Headsets, Broadband Wireless Internet

Question 12

Name 1 technology used by each wave. (Infrared Waves)

Answer 12

Night Vision Goggles, Remote Controls, Optical Fibers

Question 13

Name 1 technology used by each wave. (Visible Light)

Answer 13

Used to see, Lasers, CD Players, Used in Surgery

Question 14

Name 1 technology used by each wave. (Ultraviolet Light)

Answer 14

Black Lights; Sterilizes Water or Medical Equipment

Question 15

Name 1 technology used by each wave. (X-rays)

Answer 15

Medical Imaging, Airport Security

Question 16

Name 1 technology used by each wave. (Gamma Rays)

Answer 16

Sterilization, Cancer Treatment, Astronomy

Question 17

Which type of wave do we use to communicate in space?

Answer 17

Radio Waves

Question 18

Which type of wave can we use to sterilize wastewater?

Answer 18

Ultraviolet Light

Question 19

Which type of wave do we use to communicate signals between our TV’s and remote controls?

Answer 19

Infrared Waves

Question 20

A deep space probe uses what type of electromagnetic wave to communicate with scientists on Earth?

Answer 20

Radio Waves

Question 21

A plastic filter is fitted over a light. The light emits white light, but the filter only lets the longest wavelengths of visible light pass through. Which color would a person see?

Answer 21

Red

Question 22

How do radio waves and visible light differ?

Answer 22

Radio waves are not visible to the human eye and it has a longer wavelength and shorter frequency than Visible Light.

Question 23

What property of electromagnetic waves makes them useful for phone, radar, and television signals?

Answer 23

Ability to travel long distances and through empty space

Question 24

What are fiber optics?

Answer 24

Sound or pictures are encoded in pulses of laser light which are sent through optic fibers.

(All light reflects off the inside of the fiber, so none of it escapes.)

Question 25

What are optic fibers used for?

Answer 25

They are used to carry telephone, cable TV, and internet signals.