The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.
What are the 7 electromagnetic waves in order?
This range is known as the electromagnetic spectrum. The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.
What are the 7 types of electromagnetic waves and their uses?
Though the sciences generally classify EM waves into seven basic types, all are manifestations of the same phenomenon.
- Radio Waves: Instant Communication. …
- Microwaves: Data and Heat. …
- Infrared Waves: Invisible Heat. …
- Visible Light Rays. …
- Ultraviolet Waves: Energetic Light. …
- X-rays: Penetrating Radiation. …
- Gamma Rays: Nuclear Energy.
What are the wavelengths of the electromagnetic spectrum?
RegionWavelengthFrequencyUltraviolet100 nm3 × 1015 HzVisible (blue)400 nm7.5 × 1014 HzVisible (red)700 nm4.3 × 1014 HzInfrared10000 nm3 × 1013 HzЕщё 9 строк
What are the most dangerous waves in the electromagnetic spectrum?
Gamma rays: These are the most energetic and dangerous form of electromagnetic waves. Gamma rays are a type of harmful radiation. Typical size: 0.000001 nanometers (the width of an atomic nucleus).
What part of the visible spectrum has the highest energy?
Which type of wave travels the fastest?
P-waves and S-waves are body waves that propagate through the planet. P-waves travel 60% faster than S-waves on average because the interior of the Earth does not react the same way to both of them.
What color has highest frequency?
What is the most important electromagnetic wave?
The most important of these is visible light, which enables us to see. Radio waves have the longest wavelengths of all the electromagnetic waves. They range from around a foot long to several miles long.
Can electromagnetic waves harm you?
There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health. … Despite extensive research, to date there is no evidence to conclude that exposure to low level electromagnetic fields is harmful to human health.
What is the electromagnetic spectrum simple definition?
The Electromagnetic Spectrum. The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.
What is the electromagnetic spectrum used for?
Astronomers use the entire electromagnetic spectrum to observe a variety of things. Radio waves and microwaves – the longest wavelengths and lowest energies of light – are used to peer inside dense interstellar clouds and track the motion of cold, dark gas.
What kind of radiation is light with a wavelength of 1 cm?
Electromagnetic spectrumRegionWavelength range (approx.)CommentsMicrowave1 mm – 10 cmPresent limit of radio technology for most purposes.Far infrared30 mm – 1 mm3 K radiation fills universe.Thermal infrared3 mm – 30 mmThermal emission of earth and planets.Near infrared700 nm – 3mmSolar and stellar emission.Ещё 7 строк
Which waves can humans see?
Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength.
What is the most dangerous type of light?
Ultraviolet radiation is made up of three types of rays – ultraviolet A, ultraviolet B, and ultraviolet C. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth’s protective ozone layer.
What is the most dangerous frequency?
The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently when the whole body is exposed.