Visible light

Visible light . The human eye has developed the ability to see better in the type of light offered by the Sun. Our eyes are more sensitive to colors from yellow to green. Visible light is one of the ways energy moves. Light waves are the result of vibrations from electric and magnetic fields, and this is why they are a form of electromagnetic (EM) radiation . Visible light is just one of many types of EM radiation, and it occupies a small range of the entire electromagnetic spectrum . However, we can perceive light directly with our eyes, and because of the great importance it has for us, we elevate the importance of this small window in the EM ray spectrum.

Summary

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  • 1 Features
  • 2 Electromagnetic radiation
  • 3 Photon
  • 4 radio waves
  • 5 Sources

characteristics

The human eye has developed the ability to see better in the type of light offered by the Sun. Our eyes are more sensitive to colors from yellow to green.

Eye_sensitivity_sm.sp

Visible light is one of the ways energy moves. Light waves are the result of vibrations from electric and magnetic fields, and this is why they are a form of electromagnetic radiation (EM) . Visible light is just one of many types of EM radiation, and it occupies a small range of the entire electromagnetic spectrum . However, we can perceive light directly with our eyes, and because of the great importance it has for us, we elevate the importance of this small window in the EM ray spectrum. Light waves have wavelengthsbetween 400 and 700 nanometers (4,000 and 7,000 Å). As the rainbow fills up with nuances, our eyes perceive different lengths of light waves. Red light has relatively long wavelengths, approximately 700 nm (10-9 meters) long. Blue light and purple light have short waves, approximately 400nm. The shorter waves vibrate at higher frequencies, and have higher energies. Red light has an approximate frequency of 430 terahertz, while the frequency of blue light is approximately 750 terahertz. the photonsReds have approximately 1.8 electron Volt (eV) energy, while each blue photon transmits approximately 3.1 eV. The neighbors of visible light in the EM spectrum are infrared radiation on one side, and ultraviolet light on the other side. The infrared radiation having wavelengths longer than the red light, so that oscillates at a lower frequency and carries less energy. The ultraviolet radiationIt has shorter wavelengths than blue or violet light, so it oscillates faster, and carries more energy per proton than visible light. Light travels at the incredible speed of 299,792,458 kilometers per second (approximately 186,282.4 miles per second). At this incredible speed, light could spin more than seven times around Earth in every second! The lowercase letter “c” is used in the equations to represent the speed of light, as is the case with Einstein’s famous relationship between energy and matter : “E = mc2”. All forms of electromagnetic waves, including X – ray and the radio waves, and all other frequencies along the EM spectrum, also travel at the speed of light. Light travels faster in a vacuum, and moves more slowly in materials like water or glass.

Electromagnetic radiation

Electromagnetic radiation results from the oscillation of electric and magnetic fields. The wave of energy generated by these vibrations travels through space at the speed of light.

Photon

Light is a very strange thing. Sometimes it is better to think of light as a series of waves. Other times, it is convenient to think of light as a kind of swarm of particles.

Radio waves

Radio waves are a type of electromagnetic radiation. A radio wave has a wavelength greater than visible light. Radio waves are widely used in communications.

 

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