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Physics · 2026 · 3 marks
CBSE 2026 · Region 2 · Set 1 · Q24
Name the electromagnetic waves which are used for (i) detection of fractures in bones (ii) physiotherapy (iii) radar systems Also write their…
Name the electromagnetic waves which are used for
(i)
detection of fractures in bones
(ii)
physiotherapy
(iii)
radar systems Also write their wavelength range.
Marking-scheme solution
(i)
X-rays
Wavelength range: $\displaystyle 1$ nm to $\displaystyle 10^{-3}$ nm
(ii)
Infrared waves
Wavelength range: $\displaystyle 1$ mm to $\displaystyle 700$ nm
(iii)
Microwaves
Wavelength range: $\displaystyle 0.1$ m to $\displaystyle 1$ mm
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.