Electromagnetic radiation is more common than you think. Radio and TV stations e

Question

Electromagnetic radiation is more common than you think. Radio and TV stations emit radio waves when they broadcast their programs; microwaves cook your food in a microwave oven; dentists use X rays to check your teeth. Even though they have different names and different applications, these types of radiation are really all the same thing: electromagnetic (EM) waves, that is, energy that travels in the form of oscillating electric and magnetic fields.

Consider the following:

Part A

Which of the following statements correctly describe the various forms of EM radiation listed above?

Check all that apply.

a.) They have different wavelengths. b.) They have different frequencies. c.) They propagate at different speeds through a vacuum depending on their frequency. d.) They propagate at different speeds through nonvacuum media depending on both their frequency and the material in which they travel. e.) They require different media to propagate.

Explanation / Answer

They have different wavelengths, They have different frequencies, They propagate at different speeds through nonvacuum media depending on both their frequency and the material in which they travel.

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