The answer to that question depends heavily on who "he" was.
Electromagnetic waves or radiation. "Light," however, generally refers to that portion of the EM spectrum that our eyes can detect.
EM waves stand for Electromagnetic waves.
EM waves or electromagnetic waves is radiant energy.
EM waves are both Transverse and Longitudinal.
Normally, we detect sound by listening with our ears. As sound is waves, there are instruments that can detect and show the waves on a screen.
It i detects Radio waves.
Electromagnetic waves or radiation. "Light," however, generally refers to that portion of the EM spectrum that our eyes can detect.
No. He was content to be able to generate radio waves and then detect them all the way across the room.
It is called visible light.
EM waves stand for Electromagnetic waves.
We generate and detect electromagnetic waves that have frequenciesbetween 15 KHz and 300 GHz for a huge number of different purposes.In addition to the ones we're able to generate, other electromagnetic waves occurin nature, with frequencies up to 3,000,000,000,000,000,000 GHz.
EM waves or electromagnetic waves is radiant energy.
In 1895, any devices to generate and detect radio waves were found only in Physics laboratories. No 'radios' were manufactured or sold. Nobody really missed it, since there were no good shows on to listen to yet.
Microwaves. They give off microwaves! Also light bulbs (visible EM), heating coils (infra-red EM), and ovens (infra-red EM). Also radios and TVs receive radio waves, garage-door openers generate and transmit radio waves, blow-driers irradiate the air passing through them with infrared (heat) waves, smart and dumb cellphones all send and receive radio waves, laptops on wireless home wi-fi send and receive radio waves, and their screens generate and radiate visible light waves which make it a lot easier for us to see what they're computing.
EM waves stand for Electromagnetic waves.
EM waves are both Transverse and Longitudinal.
Normally, we detect sound by listening with our ears. As sound is waves, there are instruments that can detect and show the waves on a screen.