Match List – I with List – II.
| List - I | List - II | ||
|---|---|---|---|
| (A) | TV Transmission | (I) | Short wave bands |
| (B) | Long distance radio broadcasts | (II) | Microwave |
| (C) | RADAR | (III) | Infrared rays |
| (D) | TV Remote | (IV) | Satellite |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
(A) TV Transmission — this matches (IV) Satellite. TV signals are very high in frequency and travel in straight lines, so they are relayed over long distances through satellites.
(B) Long distance radio broadcasts — this matches (I) Short wave bands. Short waves are reflected back to the earth by the ionosphere, which makes long-distance reception possible.
(C) RADAR — this matches (II) Microwave. Microwaves have a short wavelength and can be sent as a narrow beam, which suits radar.
(D) TV Remote — this matches (III) Infrared rays. The remote sends its commands as pulses of infrared light.
NCERT (2026-27):
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.”