Answers Physics Radio Waves and Applications — QuizQuestion 3

3

QuizMultiple Choice

Radio Waves and Applications — Quiz

Question 3 • Physics

Which best explains why an MRI is useful for diagnosing cancer but ineffective in treating it?

Answer

A

The amount of energy carried by radio waves is enough to provide images but not enough to kill cells.

B

The wavelength of the radio waves used is so short that the waves cannot be used to target specific cells.

C

The frequency of the radio waves used is so high that the waves cannot be used to target specific cells.

D

The amount of energy carried by radio waves is so high that it provides images but can also damage cells.

Explanation

MRI uses radio waves to produce images by detecting signals from atoms in the body. These waves carry too little energy to damage or kill cancer cells, so they can help diagnose cancer but do not treat it. Choice A correctly describes this difference; the radio waves are not high-energy waves that can kill cells.

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