Thursday, July 29

Properties of Light

Today's topic is properties of light.

The term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength of the light waves

There are two properties of light

Reflection and Refraction.

Dispersion of Light

The fact that refractive indices differ for each wavelength of light produces an effect called dispersion of light. This can be seen by shining a beam of white light into a triangular prism made of glass. White light entering such a prism will be refracted in the prism by different angles depending on the wavelength of the light.

When light enters a transparent material some of its energy is dissipated as heat energy, and it thus looses some of its intensity. When this absorption of energy occurs selectively for different wavelengths of light, they light that gets transmitted through the material will show only those wavelengths of light that are not absorbed. The transmitted wavelengths will then be seen as color, called the absorption color of the material.

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