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Question 64Asked in DSSSB TGT Computer Science (Technical), 12 Sep 2025, Shift 3 (5:00 PM)

Cellular phones and televisions use the __________ regions of the electromagnetic spectrum

Cellular phones and televisions use the __________ regions of the electromagnetic spectrum for signal transmission.
  1. Aultraviolet and visible light
  2. Bgamma rays and X-rays
  3. Cradio waves and microwaves
  4. Dinfrared and visible light
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Correct answer: (C) radio waves and microwaves

Explanation

Mobile phones and TV broadcasting send signals on radio waves and microwaves, the long-wavelength part of the spectrum, because these travel far and pass through the atmosphere.

From DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 3 (5:00 PM)

This is question 64 of DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 3 (5:00 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.