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Given below in the left column are different modes of communication using the kinds of waves given in the right column. A. Optical Fibre communication B. Radar C. Sonar D. Mobile Phones P. Ultrasound Q. Infrared Light R. Microwaves S. Radio Waves From the options given below, find the most appropriate match between the entries in the left and the right column.

1. A-R, B-P, C-S, D-Q
2. A-S, B-Q, C-R, D-P
3. A-Q, B-S, C-R, D-P
4. A-Q, B-S, C-P, D-R

Correct answer: A-Q, B-S, C-R, D-P

Solution

The correct matches align each communication mode with its corresponding wave type: Optical Fibre communication uses Infrared Light (A-Q), Radar operates with Radio Waves (B-S), Sonar utilizes sound waves, specifically in the ultrasound range (C-R), and Mobile Phones communicate using Radio Waves (D-P). This pairing accurately reflects the principles of each communication method.

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