Which type of electromagnetic waves are used to kill cancerous cells?

• A. gamma rays
• B. visible light
• C. infrared light
• D. microwaves

Answer: (A)

Gamma rays are a form of high-energy electromagnetic radiation and are known for their ability to penetrate tissue and cells effectively. This unique property makes them particularly useful in medical applications, especially in the treatment of cancer. When directed precisely at tumors, gamma rays can disrupt the DNA of cancerous cells, ultimately leading to cell death or the inhibition of their growth.

In contrast, visible light, infrared light, and microwaves have significantly lower energy levels and are not effective for targeted cancer treatment. Visible light lacks the potency to disrupt cellular structures at the level required for cancer therapy, while infrared light is primarily used for therapeutic heating and does not directly target cancerous cells. Microwaves can cause heating effects but are not employed in a clinical setting to kill cancer cells in the same way that gamma rays are. Thus, gamma rays emerge as the most effective choice for this purpose, clearly demonstrating their significant role in modern cancer treatment protocols.