X-rays are more harmful to human beings than ultraviolet radiations because X-rays-
Physics · Class 12 · CBSE — Electromagnetic Waves
X-rays are more harmful to human beings than ultraviolet radiations because X-rays-
- have frequency lower than that of ultraviolet radiations.
- have wavelength smaller than that of ultraviolet radiations.
- move faster than ultraviolet radiations in air.
- are mechanical waves but ultraviolet radiations are electro-magnetic waves.
Answer
(B) have wavelength smaller than that of ultraviolet radiations.
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