Page 83 - Science Course 3 (Book 2)

Mo10-L5a: How are Light Waves Different From Sounds Waves?

Key Concept Key Concept
How are Light Waves Different From Sounds How are Light Waves Different From Sounds
Waves? Waves?
How are light waves different from sound waves? How are waves in the electromagnetic spectrum
different?

A light source is something that emits light.

Directional Light Source Point Light Source

X-rays and radio waves are some of the other types
of electromagnetic waves.

Scientists classify electromagnetic waves into
groups based on their wavelengths and frequencies.
Spot Light Source Ambient Light Source

Cellphones use microwaves. Ultraviolet waves have wavelengths
Microwaves have wavelengths between 400 nm and 10 nm and
between 0.3 and 0.001m. can cause sunburn.

Radio waves Microwaves Infrared Ultraviolet X-rays Gamma rays

Radios and TV use radio
waves. Radio waves have X-rays have wavelengths
wavelengths greaten than between 10 nm and 0.01
about 0.3m. nm.

Infrared waves have Light waves have wavelengths
wavelengths between about between about 700nm and
0.001m and 700nm 400 nm.

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