✓ Board-verified
Physics · 2026 · 3 marks
CBSE 2026 · Region 2 · Set 2 · Q24
Name the electromagnetic waves which are used 3 (i) as a diagnostic tool in medicine (ii) in remote switches for TV sets (iii) in water purifiers…
Name the electromagnetic waves which are used $\displaystyle 3$
(i)
as a diagnostic tool in medicine
(ii)
in remote switches for TV sets
(iii)
in water purifiers Also write their wavelength range.
Marking-scheme solution
(i)
X-rays
Wavelength range: $\displaystyle 1$ nm to $\displaystyle 10^{-3} \mathrm{~nm}$
(ii)
Infrared waves
Wavelength range: $\displaystyle 1$ mm to $\displaystyle 700$ nm
(iii)
Ultraviolet waves
Wavelength range: $\displaystyle 400$ nm to $\displaystyle 1$ nm
All Electromagnetic Waves questions2026 question paperNCERT solutions: Electromagnetic WavesPractice Electromagnetic Waves →
More from Electromagnetic Waves
- The ratio of amplitude of electric field to the amplitude of the magnetic field associated with an electromagnetic wave propagating in glass (n=1 ·…2026
- The magnetic field in a plane electromagnetic wave travelling in glass (n=1 · 5) is given by B_y=(2 × 10^-7 T) sin (α x+1 · 5 × 10^11 t) where x is…2026
- What are infrared waves? Why are these waves referred to as 'heat waves'? Give any two uses of these waves.2026
- Differentiate between conduction current and displacement current. A capacitor is connected across a source providing time-dependent current. Explain…2026
- Which one of the following has the highest frequency?2024
- The electromagnetic waves used in radar systems are:2023
- What are microwaves? How are they produced? Give any two uses of microwaves.2026
- Which one of the following electromagnetic radiation has the least wavelength?2023
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.