X-rays are more harmful to human beings than ultraviolet ...

CBSE Class 12 Physics 2025 All Sets Solved Paper

Question : 7 of 16

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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

Solution:

X-rays are more harmful than ultraviolet (UV) rays because:
• They have a shorter wavelength than UV rays
• Higher energy per photon, leading to deeper penetration into human tissues, causing ionization and DNA damage.

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