Given below in the left column are different modes of communication using the kinds of waves given in the right column.
From the options given below, find the most appropriate match between entries in the left and the right column.
From the options given below, find the most appropriate match between entries in the left and the right column.
Answer: A → II, B → III, C → I, D → IV
Solution
Each technology pairs with the wave it actually uses. Optical fibre communication carries signals as infrared light; radar relies on microwaves for detection and ranging; sonar uses ultrasound to probe underwater; and mobile phones communicate over radio waves. So optical fibre goes with infrared, radar with microwaves, sonar with ultrasound, and mobile phones with radio waves.
JEE Main · 2019 · 10 Apr 2019 · Shift 1 · Match the columns