Electromagnetic Waves and Light Study Guide

An electromagnetic wave is a ___________________________ that has oscillating electric and magnetic fields.

• transverse wave

• particle

• longitudinal wave

• electric wave

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________________ waves have the longest wavelengths.

• Microwave

• Radio

• Infrared

• Ultraviolet

List 3 things that use radio waves

• a. Mobile phones b. Wi-Fi routers c. Bluetooth devices

• a. Microwave ovens b. X-ray machines c. Infrared cameras

• a. Television broadcasts b. AM/FM radios c. GPS devices

• a. Ultrasound machines b. Fiber optic cables c. Electric heaters

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____________________ waves are used in cell phones to receive text and other data, in bluetooth headsets, GPS, and Broadband Wireless Internet.

• radio

• sound

• gamma

• microwave

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The only electromagnetic wave the human eye can see is _______________________.

• infrared light

• ultraviolet light

• visible light

• X-rays

________________ is the lowest frequency of light while ________________ is the highest frequency of light.

When all colors are present in equal amounts in the same place you see ______________.

• black light

• white light

• red light

• blue light

List 2 ways ultraviolet waves are helpful:

• b. Treating skin conditions

• a. Disinfecting water

• c. Producing vitamin D

• e. Fading fabrics

• d. Causing sunburn

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List 3 ways ultraviolet light is harmful:

• c. Damages the eyes

• d. Improves mood

• b. Skin damage

• a. Causes skin cancer

• e. Sunburns

This type of electromagnetic wave is used for medical imaging and airport security.

• X-rays

• Microwaves

• Radio waves

• Infrared

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