Question

select all that apply
of the following kinds of electromagnetic waves, which two can be damaging to human tissue?
infrared
radio
gamma rays
ultraviolet
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Explanation:

Gamma rays have very high energy and can penetrate deeply into the body, causing damage to cells and DNA. Ultraviolet (UV) radiation, especially from the sun, can damage the skin (e.g., sunburn, skin cancer) and eyes (e.g., cataracts). Infrared is mainly associated with heat (like in heat lamps) and in normal exposure is not as damaging as gamma rays and UV. Radio waves have low energy and are not typically damaging to human tissue in normal circumstances (e.g., used in communication devices like radios and cell - phones with no known direct tissue - damaging effects at normal exposure levels).

Answer:

gamma rays, ultraviolet