What is ultraviolet radiation?

What is ultraviolet radiation?

• A. A high energy form of light that is invisible to the human eye but can cause damage to DNA.
• B. A type of sound wave
• C. A chemical property
• D. A form of heat energy

Answer: (A)

Ultraviolet radiation is a form of electromagnetic radiation with wavelengths shorter than visible light, so it carries more energy per photon than visible light and is invisible to the human eye. That high energy can interact with biological molecules like DNA, causing chemical changes such as thymine dimers that can lead to mutations if not repaired. This is why UV exposure can damage DNA and skin. It’s not a sound wave, which is a mechanical vibration in air or other media, nor a chemical property of a substance, nor primarily a form of heat energy (though it can heat surfaces as a byproduct). Understanding this helps explain why UV is described as high-energy, invisible light with potential DNA-damaging effects.

Ultraviolet radiation is a form of electromagnetic radiation with wavelengths shorter than visible light, so it carries more energy per photon than visible light and is invisible to the human eye. That high energy can interact with biological molecules like DNA, causing chemical changes such as thymine dimers that can lead to mutations if not repaired. This is why UV exposure can damage DNA and skin. It’s not a sound wave, which is a mechanical vibration in air or other media, nor a chemical property of a substance, nor primarily a form of heat energy (though it can heat surfaces as a byproduct). Understanding this helps explain why UV is described as high-energy, invisible light with potential DNA-damaging effects.