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What exactly does a "prism" do? How does it work?well it turns out that a prism has light that reflects and on the other side out comes colors of the rainbow
white and red
When light traverse the interface between two transparent material with a different refraction index it undergo refraction, that is the angle of incidence on the interface is different from the angle with which the light comes out from the surface itself. In a prism refraction happens as the light passes from air to the prism material (generally glass or a polymer like PMMA, also called Plexiglas) and when the light leaves the prism, passing from it to air again. Since the difference of incident and emerging angles is opposite passing from air to prism and from prism to air (let us call that angle q) the total diffraction angle due to the passage through a prism is 2 q. Since q depends on the light wavelength (that is on the light color) different colors are diffracted at different angles and the light at the prism output appears as decomposed in different rays, exiting from the prism with different angles, one for each color. Doping the prism glass with impurities increasing a lot its refraction index, complete refraction can be obtained for selected light colors. These colors at the first interface with the prism have a refraction angle greater than 90° and light of those colors does not enter into the prism. Thus colors suffering total refractions lack from the prism output light.
When the light ray strikes the surface of the prism, both when it enters and when it leaves, it bends owing to the different in the speeds of light in air and the material of which the prism is made. The amount of bending depends in part on the frequency of the light which is related to the colour of the light, hence the appearance of a colour spectrum which can be seen from a triangular prism.
Light bends in glass dependent on its thickness. Violet comes from the thin part and red from the thick part of a prism.
When ordinary visible light shines on a prism.
violet
What exactly does a "prism" do? How does it work?well it turns out that a prism has light that reflects and on the other side out comes colors of the rainbow
white and red
When light traverse the interface between two transparent material with a different refraction index it undergo refraction, that is the angle of incidence on the interface is different from the angle with which the light comes out from the surface itself. In a prism refraction happens as the light passes from air to the prism material (generally glass or a polymer like PMMA, also called Plexiglas) and when the light leaves the prism, passing from it to air again. Since the difference of incident and emerging angles is opposite passing from air to prism and from prism to air (let us call that angle q) the total diffraction angle due to the passage through a prism is 2 q. Since q depends on the light wavelength (that is on the light color) different colors are diffracted at different angles and the light at the prism output appears as decomposed in different rays, exiting from the prism with different angles, one for each color. Doping the prism glass with impurities increasing a lot its refraction index, complete refraction can be obtained for selected light colors. These colors at the first interface with the prism have a refraction angle greater than 90° and light of those colors does not enter into the prism. Thus colors suffering total refractions lack from the prism output light.
When the light ray strikes the surface of the prism, both when it enters and when it leaves, it bends owing to the different in the speeds of light in air and the material of which the prism is made. The amount of bending depends in part on the frequency of the light which is related to the colour of the light, hence the appearance of a colour spectrum which can be seen from a triangular prism.
Light bends in glass dependent on its thickness. Blue comes from the thin part and red from the thick part of a prism.
Light bends in glass dependent on its thickness. Violet comes from the thin part and red from the thick part of a prism.
Light bends in glass dependent on its thickness. Violet comes from the thin part and red from the thick part of a prism.
The three colors magenta, cyan, and yellow * * * * * Black light? Black light is the absence of radiation of any wavelength. Black light cannot go anywhere.
A prism tends to do the trick or any shape that comes to a point.
Light bends in glass dependent on its thickness. Violet comes from the thin part and red from the thick part of a prism.