How much of the visible spectrum is contained in white light?
All of it. White light is the blend of all visible colors.
All colours of the visible light spectrum are absorbed by black objects and that's how you "see" black. All colours of the visible light spectrum are reflected by white objects and that's how you "see" white. Not very clear? Go to this page for more info on visible spectrum: http://en.wikipedia.org/wiki/Visible_spectrum
This light consists of all the colors of the rainbow, which are in the visible spectrum of electromagnetic waves. White light consists of: violet, indigo, blue, green, yellow, orange, and red, in the order from the lower end of the electromagnetic spectrum of visible light to the higher end of the spectrum.
White light is composed of many colours. When these colours combine, they look white. One way of showing that white light is composed of different colours is to make white light pass through a glass prism. This splits up the white light into its constituent colours. I f you hold a screen in its path, you will see a band of colours. This band of colours is called the spectrum. Since it is visible to…
White light is a combination of seven fundamental colors namely: red, orange, yellow, green, blue, indigo, and violet. When white light hits a barrier, it is reflected, refracted, or absorbed. In refraction, there is a great possibility that this light will also undergo dispersion. Dispersion is the breaking of white light into all the colors of the visible spectrum.
One device that splits white light into the colors of the visible spectrum is called a prism. It is a triangular piece of glass through which a narrow band of white light can pass. The blue color light is bent most, and the red color light bent the least. So the colors in-between red and blue are seen on a screen as a spectrum. A rainbow is produced when drops of water in the sky…
When you shine white light through a prism, at the correct angle wherever the prism is pointing you will see the spectrum, this is because when the light shines through the angles of the prism, the white light will become dispersed through the angles so that the white light is streched out to reveal what the spectrum is made up of =D
White light is the sum total of the colors in the visible spectrum. We know this because it's possible to separate white light, with a simple prism, into a visible spectrum, from red to violet. If you have a prism at home you can try it yourself! if not, do an internet search for Dark Side of the Moon, by Pink Floyd.