I keep hearing people say IR light or UV light, but if they are outside of the human visible spectrum, are they still considered light rays? What is the real definition of light? Where does light begin and end in the EM spectrum. Are radio waves, then, also considered light? Just light that we cannot see? What about X-Rays?
Light is electromagnetic radiation. Visible light/radiation is roughly between the wavelengths of 400 and 700 nm. So, yeah, radio waves, x-rays, ultraviolet, gamma rays, microwaves, infrared radiation are all forms of light, just not visible light.
Light colloquially would just refer to the visible spectrum but scientifically it refers to all electromagnetic waves, from gamma waves to radio waves. They are all the same phenomenon, just at a spread of frequencies and wavelengths.
Are IR and UV rays considered light rays? No. I keep hearing people say IR light or UV light, but if they are outside of the human visible spectrum, are they still considered light rays? No, certainly not. What is the real definition of light? Having wavelength range of 0.7μ (Red) to 0.38μ (Violet). Where does light begin and end in the EM spectrum. 0.7μ (Red) and 0.38μ (Violet). Are radio waves, then, also considered light? No, however they are EM waves. Just light that we cannot see? Yes, that is what IR or UV is. Still, don't bring in 'light' say 'Radiation'. What about X-Rays? No, not in the least
The entire electromagnetic spectrum, from radio waves to x-rays and even gamma rays are light Visible light is small range of the EM spectrum. It's like being able to hear only ONE octave of a piano scale instead of being able to hear all the keys on piano, except it's a seeing handicap. Sound waves are NOT electromagnetic waves.Sound waves are transmitted my a medium by the atoms and molecules of that medium being pulled apart and pushed together. Sound waves are longitudinal waves, while electromagnetic light waves are transverse waves with an Electric field and a magnetic field perpendicular to each other traveling perpendicular to the electric and MAGNETIC fields. Yes, the entire EM spectrum is light waves. human beings just can't see the entire range. Our eyes evolved to see right around where the Sun's radiation is maximum. That pretty much proves we evolved on Earth. We didn't evolve on some other planet and were transported to Earth by some technologically advanced species of E.T.s imagine.gsfc.nasa /docs/scienc...
Yes they are light rays. Just because the human eye can't see them does not effect the fact that they are light. Light rays are a type of electromagnetic energy. in the range of 4000 (violet) to 7700 (red) in the EM Spectrum Radio waves are not a type of light. X rays are part of the electromagnetic spectrum and are a type of light but beyond our visual perception.
