Unit Test — Unit test

Question 22 • *MHS - Physical Science - S1 - CR

What are three properties of electromagnetic waves?

Answer

They travel slower than the speed of light, they include visible light waves, and they can transfer energy through empty space.

They need matter through which to travel, they travel at the speed of light, and they include visible light waves.

They travel at the speed of light, they include ultraviolet waves, and they can transfer energy through empty space.

They include ultraviolet waves, they need matter through which to travel, and they travel slower than the speed of light.

Explanation

Electromagnetic waves include ultraviolet waves and can transfer energy through empty space, so they do not need matter to travel. In a vacuum, they travel at the speed of light. Choice C lists all three properties; choices that say they need matter or travel slower than light are incorrect.

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