Which best explains why infrared waves are ineffective for treating cancer? they have frequencies that are too high to kill cancer cells. they have short wavelengths, which can be harmful to healthy cells. they do not transfer enough energy to destroy cancer cells. they have long wavelengths, which can be harmful to healthy cells.

They do not transfer enough energy to destroy cancer cells.

Explanation:

The energy of the electromagnetic waves is directly proportional to their frequency, according to the formula:

where h is the Planck constant and f is the frequency.

Therefore, the higher the frequency, the higher the energy.

In order to kill cancer cells, electromagnetic waves with high energy must be used: this means that we should use the electromagnetic waves which have the highest frequency, which are gamma rays.

Infrared waves, on the contrary, have much lower frequency, so they do not have enough energy to kill cancer cells.

(in fact, electromagnetic waves are ordered from highest to lowest frequency as follows:

gamma rays

X-rays

ultraviolet

visible light

infrared radiation

microwaves

radio waves

so we see that infrared waves are low-frequency radiation)

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