Correct Answer : Heinrich Hertz
Explanation : The German physicist, Heinrich Hertz, first applied the theory given by Maxwell to prove the existence of radio waves in 1887. To honor him the unit of frequency is given his name.
Correct Answer : Option (D) : 1477.8Mhz
Explanation : Wavelength =8 in.= 0.203 mFrequency = 300/0.203 = 1477.8Mhz.
Correct Answer : Option (B) : Satellite communication
Explanation : SHFs or Super High Frequency EM waves are those which lie between the frequency range of 3 to 30GHz range. These microwaves frequencies are widely used in satellite communication and radar.
Correct Answer : Option (B) : Books
Explanation : Infrared radiation is generally associated with heat. Infrared is produced by light bulbs, human bodies, and basically any physical equipment that generates heat.
