The ultraviolet portion of the spectrum has frequencies:

• A. Higher than those of visible light and lower than X-rays
• B. Lower than visible light
• C. Equal to visible light
• D. Not part of the electromagnetic spectrum

Answer: (A)

Ultraviolet light sits between visible light and X-rays on the electromagnetic spectrum, so its frequency is higher than visible light but lower than X-rays. Frequency corresponds to photon energy, so UV photons carry more energy than visible photons but less than X-ray photons. That makes the statement describing UV as having frequencies higher than visible light and lower than X-rays the correct one. The other options would place UV below visible, equal to visible, or outside the spectrum, which isn’t accurate.