Electromagnetic Study Guide

Question 1

Electromagnetic Spectrum

Answer 1

• is the range of wavelengths and frequencies that make up electromagnetic radiation
• is made up of radio waves, microwaves, infrared rays, visible light, ultra violet rays, x-rays and gamma rays.

Question 2

Radio Waves

Answer 2

• they have the longest wavelengths on the electromagnetic spectrum and the lowest frequencies.
• televisions and radio signals are transmitted through radio waves.

Question 3

Microwaves

Answer 3

• microwaves have a higher frequency and a shorter wavelength compared to radio waves.
• microwaves are used to heat up food as well as radar.

Question 4

Infrared

Answer 4

• has a shorter wavelength and a higher frequency than microwaves
• used in thermograms, thermal imaging and remote controls
• mid-range

Question 5

Visible Light

Answer 5

• is the only type of electromagnetic radiation that we can see.
• the waves have shorter wavelengths and higher frequencies than infrared.
• the narrowest part of the EM spectrum.
• mid-range

Question 6

Ultraviolet Rays

Answer 6

• have shorter wavelengths and higher frequencies than visible light.
• is often used in medical practices and is the radiation from the sun that we shield ourselves from using sunscreen .
• mid-range

Question 7

X-Rays

Answer 7

• have shorter wavelengths than ultraviolet rays and higher frequencies.
• can pass through some forms of matter such as skin but it cannot penetrate through bone due to its density. It is absorbed instead.

Question 8

Gamma Rays

Answer 8

• have the shortest wavelengths and the highest frequencies of any other type of radiation on the EM spectrum which means they have the highest energy.
• are dangerous but also in some treatments of cancer