The colour of visible light with the longest wavelength is red (approximately 700 nanometres).
There is no visible light with a wavelength longer than red light. However, infrared light has the next longest wavelength in the electromagnetic spectrum.
The color with the longest wavelength is red. The color with the next longest wavelength is orange, then yellow, then green, then blue, then indigo, and finally violet.
Radio waves have a longer wavelength than visible light.
Blue light has shorter wavelength than red light. Remember ROYGBIV? If you reverse the sequence - VIBGYOR, you have all the colors listed from shortest wavelength to longest wavelength in the visible spectrum. Or, you can just simply consult an electromagnetic (EM) spectrum.
The color of light is related to its frequency or wavelength.
Its wavelength (or frequency).
Wavelength
It's not that a particular color has the longest wavelength. The wavelength BECOMES longer when a star moves away from us. Red light has a longer wavelength than blue, for example.
Radar has the longer wavelength.
Each color has a wavelength and frequency associated with it. We're familiar with the colors of the rainbow: red, orange, yellow, green, blue and violet. These colors range from longer wavelength (lower frequency) red up through shorter wavelength (higher frequency) violet. As one moves up through those colors from red to violet, the color is an indication to relative wavelength.
Red has the longest wavelength, up to 750nm.
The colder a star is the longer the light waves it emits. Light wavelength is what we perceive as color.
Radio waves have a longer wavelength than visible light.
Shorter or longer than what ? The wavelength of visible light is shorter than that of radio and heat, and longer than the wavelength of X-ray and gamma radiation. And the wavelength of green light is shorter than red light but longer than blue light.
Light's color depends on its wavelength. Shorter wavelengths make light more red, while longer make it more violet colored. Red light has a wavelength of approximately 700 nm, while violet light has a wavelength of 400 nm.
Blue light has shorter wavelength than red light. Remember ROYGBIV? If you reverse the sequence - VIBGYOR, you have all the colors listed from shortest wavelength to longest wavelength in the visible spectrum. Or, you can just simply consult an electromagnetic (EM) spectrum.
Heat has longer wavelength / lower frequency than visible light.
Red light (longer wavelength)
By the light's wavelength.