Facts about White Light
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This diagram introduces white light, the name given to light that contains all wavelength of the visible spectrum.
Remember that:
- White light contains all the wavelengths of the visible spectrum.
- White light contains all wavelengths of light that correspond with the colours of the rainbow.
- White light does not include infrared and ultraviolet wavelengths of light.
Description
Facts about White Light
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About the diagram
About the diagram
- This diagram introduces white light, the name given to light that contains all wavelengths of the visible spectrum.
Remember that:
- White light contains all the wavelengths of the visible spectrum, but to produce white light, each wavelength must be of equal intensity.
- White light contains all wavelengths of light that correspond with the colours of the rainbow.
- The white light human beings see does not include infrared and ultraviolet wavelengths of light because they are outside the visible spectrum.
Now let’s look at that in detail:
- White light is the name given to visible light that contains all wavelengths of the visible spectrum at equal intensities.
- As light travels through a vacuum or a medium it is described as white light if it contains all the wavelengths of visible light.
- As light travels through the air it is invisible to our eyes.
- The term white light doesn’t mean light is white as it travels through the air.
- When white light strikes a neutral-coloured object and all wavelengths are reflected it appears white to an observer.
- When some wavelengths are absorbed by an object and others are reflected then it is the reflected wavelengths that determine the colour an observer sees.
Some key terms
Visible spectrum
RGB colour model
Electromagnetic spectrum
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