About 150 years ago, James Clerk Maxwell, an English scientist, developed a scientific theory to explain electromagnetic waves. He noticed that electrical fields and magnetic fields can couple together to form electromagnetic waves.
What is the origin of the electromagnetic spectrum?
EM waves originate from the vibration of charged particles, and unlike other waves, they can travel without a medium. The vast range of frequencies for EM waves is described by the electromagnetic spectrum. The spectrum stretches from the lowest frequency radio waves to the highest frequency gamma rays.
What is the first electromagnetic spectrum?
The first discovery of electromagnetic radiation other than visible light came in 1800, when William Herschel discovered infrared radiation. He was studying the temperature of different colours by moving a thermometer through light split by a prism. He noticed that the highest temperature was beyond red.
Who produced electromagnetic wave first?
Michael Faraday was the first scientist who produced electromagnetic waves in a laboratory. Michael Faraday, a name you might be already familiar with was an English scientist who was born in September, 1971. He is famously known for his contributions in the fields of electromagnetism and electrochemistry.
What is the highest frequency color?
When it comes to visible light, the highest frequency color, which is violet, also has the most energy. The lowest frequency of visible light, which is red, has the least energy.
What is the highest frequency?
Gamma rays have the highest frequency in the electromagnetic spectrum. They have a frequency of the order of about 1020 to 1022 Hz.
How electromagnetic waves are produced in laboratory?
Electromagnetic waves are produced whenever electric charges are accelerated. This makes it possible to produce electromagnetic waves by letting an alternating current flow through a wire, an antenna. The frequency of the waves created in this way equals the frequency of the alternating current.
What is the slowest Colour?
Violet travels the slowest so it is on the bottom and red travels the fastest so is on the top. This is because what is called the index of refraction, (the ratio of the speed of light in a vacuum to the speed of light in a material), is increased for the slower moving waves (i.e. violet).
Why is the sky blue?
The sky is blue due to a phenomenon called Raleigh scattering. This scattering refers to the scattering of electromagnetic radiation (of which light is a form) by particles of a much smaller wavelength. … These shorter wavelengths correspond to blue hues, hence why when we look at the sky, we see it as blue.
Which light is highest energy?
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies.