Which statement about ultraviolet radiation relative to violet light is true?

Which statement about ultraviolet radiation relative to violet light is true?

• A. It's lower in frequency than violet light
• B. It's higher in frequency than violet light
• C. It has the same frequency as violet light
• D. It is not part of the visible spectrum

Answer: (B)

Ultraviolet radiation has a higher frequency than violet light. Frequency and wavelength are inversely related (f = c/λ), and violet light sits at the short-wavelength edge of the visible spectrum (around 380–450 nm). Ultraviolet light has even shorter wavelengths, so its frequencies are higher. Since energy per photon increases with frequency (E = hf), UV photons carry more energy than violet photons. While UV isn’t visible, the question compares UV to violet in terms of frequency, and that relationship is why the statement is true.

Ultraviolet radiation has a higher frequency than violet light. Frequency and wavelength are inversely related (f = c/λ), and violet light sits at the short-wavelength edge of the visible spectrum (around 380–450 nm). Ultraviolet light has even shorter wavelengths, so its frequencies are higher. Since energy per photon increases with frequency (E = hf), UV photons carry more energy than violet photons. While UV isn’t visible, the question compares UV to violet in terms of frequency, and that relationship is why the statement is true.