Q:

What color has the longest wavelength?

A:

Quick Answer

Red is the color on the visible electromagnetic spectrum that has the longest wavelength. The wavelength of red on the spectrum is 700 nanometers. Conversely, the color with the shortest wavelength is violet at 400 nanometers.

Know More
What color has the longest wavelength?
Credit: Nikola Nastasic E+ Getty Images

Full Answer

Although not visible to the naked eye, ultraviolet radiation falls directly below visible violet on the spectrum. Similarly, infrared radiation is found directly above visible red on the spectrum. Wavelengths below 400 nanometers are too short for human beings to see, and wavelengths above 700 nanometers are too long for human beings to see. In considering the spectrum as a whole, radio waves are the longest, while gamma rays are the shortest.

Learn more in Colors

Related Questions

  • Q:

    Which colors make red?

    A:

    Red is a primary color, so it is not usually possible to produce it by mixing two or more colors. However, print technology uses alternative primary colors, and an overlapping of magenta and yellow produces red.

    Full Answer >
    Filed Under:
  • Q:

    Which two colors can you mix to make red?

    A:

    Red is a primary color and cannot be produced by mixing other colors. Red, blue and yellow are the three primary colors. Only secondary and tertiary colors can be fabricated by mixing the appropriate colors together. Every color that exists originates from the primary colors.

    Full Answer >
    Filed Under:
  • Q:

    What color is sable?

    A:

    The color sable is a very dark, almost black, shade of brown. It is named for the animal called a sable, which is a very dark brown, silky creature.

    Full Answer >
    Filed Under:
  • Q:

    What color is crimson?

    A:

    Crimson is an intense red color that incorporates a slight hint of blue. Graphic designers who work with the RGB color system use the numbers 220, 20 and 60 to reference crimson.

    Full Answer >
    Filed Under:

Explore