Match List-I with List-II
| List-I | List-II |
| Uses of electromagnetic waves | Type of electromagnetic waves |
| (A) Aircraft navigation | (I) Infrared waves |
| (B) Cellular phones | (II) Microwaves |
| (C) Remote switches for TV sets | (III) Ultraviolet rays |
| (D) LASIK eye surgery | (IV) Radio waves |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
Each use depends on the wavelength range of the wave: how it travels, what it passes through and what it does to matter.
(A) Aircraft navigation — this matches (II) Microwaves. Radar used in aircraft navigation works with microwaves, whose short wavelength gives sharp, well-directed beams.
(B) Cellular phones — this matches (IV) Radio waves. Mobile phones carry voice signals on radio waves in the ultra high frequency (UHF) band.
(C) Remote switches for TV sets — this matches (I) Infrared waves. The remote control sends coded pulses from an infrared LED to a sensor on the set.
(D) LASIK eye surgery — this matches (III) Ultraviolet rays. Ultraviolet laser light is absorbed in a very thin surface layer of the cornea, so it can reshape the cornea precisely.
NCERT (2026-27):
Radio Waves – “… Cellular phones use radio waves to transmit voice communication in the ultrahigh frequency (UHF) band.”
Microwaves – “… Due to their short wavelengths, they are suitable for the radar systems used in aircraft navigation.”
Infrared Waves – “… Electronic devices (for example semiconductor light emitting diodes) also emit infrared and are widely used in the remote switches of household electronic systems such as TV sets, video recorders and hi-fi systems.”
Ultraviolet Rays – “… Due to its shorter wavelengths, UV radiations can be focussed into very narrow beams for high precision applications such as LASIK (Laser-assisted in situ keratomileusis) eye surgery.”