Which type of UV radiation is known as short wave?

Which type of UV radiation is known as short wave?

• A. UVC
• B. UVA
• C. UVB
• D. Visible

Answer: (A)

The short-wave end of ultraviolet radiation is the portion with the shortest wavelengths, which carries the most energy per photon. In the UV range, the three main bands are UVA (longest), UVB (middle), and UVC (shortest). Because UVC has the shortest wavelengths, it is the short-wave type. In practice, UVC sits at roughly 100–280 nanometers, and it’s largely blocked by the Earth’s atmosphere, so it doesn’t reach the surface under normal conditions. That high energy makes it very effective for germicidal purposes, but it also means it can be harmful to skin and eyes with direct exposure. Visible light is outside the UV range and thus not considered UV radiation.

The short-wave end of ultraviolet radiation is the portion with the shortest wavelengths, which carries the most energy per photon. In the UV range, the three main bands are UVA (longest), UVB (middle), and UVC (shortest). Because UVC has the shortest wavelengths, it is the short-wave type.

In practice, UVC sits at roughly 100–280 nanometers, and it’s largely blocked by the Earth’s atmosphere, so it doesn’t reach the surface under normal conditions. That high energy makes it very effective for germicidal purposes, but it also means it can be harmful to skin and eyes with direct exposure. Visible light is outside the UV range and thus not considered UV radiation.