Question

Comparatively these are less harmful to the organisms

• A. Ultra violet - A rays
• B. Ultra violet - B rays
• C. Ultra violet - C rays
• D. X-rays

Hint:

When considering UV rays, remember that the closer to the start of the spectrum (A rays), the less harmful they are to biological organisms.

Answer 1

The Correct Option is A

Among the different types of ultraviolet rays, UV-A rays are comparatively less harmful to organisms. These rays have the longest wavelength in the ultraviolet spectrum, which allows them to penetrate deeper into the skin, but they do not cause as much harm compared to UV-B and UV-C rays.

• UV-A rays: These are less energetic than UV-B and UV-C rays. They are responsible for tanning of the skin and have the potential to cause skin aging, but they are generally not as harmful as the more energetic UV-B and UV-C rays.
• UV-B rays: These are more harmful than UV-A rays and are responsible for sunburns and an increased risk of skin cancer.
• UV-C rays: These are the most harmful and are completely absorbed by the Earth's atmosphere, but they are dangerous if encountered from artificial sources.

Therefore, UV-A rays are comparatively less harmful, making Option (1) (A) the correct answer.