Question

Identify the mismatched pair:
A. Microwaves – Aircraft navigation
B. Radio waves – Cellular phone
C. Infrared waves – Remote switches
D. Ultraviolet rays – LASIK
E. $\gamma $ - rays - Klystron

Answer 1

Hint:A type of energy that is everywhere surrounding us that comes in a variety of types is called electromagnetic waves also known as EM waves. EM waves include radio waves, microwaves, X-rays, infrared waves, gamma rays, and many others.

Complete answer:
The above question contains pairs of EM waves and their uses, of which ones is false. Let us take a look at all of the options.

Microwaves are deemed ideal for radar systems which are used in aircraft navigation. This is due to their short or low wavelength spectrum range of ${10^{ - 3}}m - 0.3m$ , which helps in making them suitable for large -distance communications.

Cell phones interact through radio waves. The knowledge is carried by radio waves, which fly at the speed of light through the air. Cell phones send radio signals out in all directions. Before reaching the closest mobile tower, the waves will be captured and mirrored by nearby surfaces.

Infrared light is the primary hardware used in home remote controls. The signal sent by a remote-control handset and the machine it controls is made up of infrared light pulses. Thus, in remote controls, infrared waves are being used.

Due to their short wavelengths, ultraviolet rays are commonly used in precision applications such as LASIK eye surgery. A klystron is a type of linear beam vacuum tube that is used as an amplifier for high radio frequencies ranging from ultra-high frequency to microwaves and not $\gamma $ - rays.

Thus, the option E is the mismatched pair because a klystron is not related to $\gamma $ - rays.

Note:Sunlight is also a kind of electromagnetic energy, but visible light accounts for just a limited portion of the EM spectrum, which includes a wide range of electromagnetic wavelengths. The Sun is composed of plasma, which is a gas consisting of bare ions and electrons. This plasma is heated by the energy released by nuclear fusion, and the travelling charges emit electromagnetic waves.