19
QuizMultiple Choice

N/A — Exam

Question 19 • Physics

Which best explains why infrared waves are ineffective for treating cancer?

Answer
A
They have frequencies that are too high to kill cancer cells.
B
They have long wavelengths, which can be harmful to healthy cells.
C
They do not transfer enough energy to destroy cancer cells.
D
They have short wavelengths, which can be harmful to healthy cells.

Explanation

A wave’s energy increases with its frequency and decreases with its wavelength. Infrared waves have relatively low frequencies and long wavelengths, so they do not carry enough energy to destroy cancer cells; they mainly produce heating. Thus, “They do not transfer enough energy to destroy cancer cells” is the best choice.

AI-written and checked against the verified answer.

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