Visible Light Spectrum
The light disperses into a wide range of colours after passing through a glass prism. We can see this by looking at it from a different perspective. The refractive index associative with a material is not fixed it varies with the frequency of the light used.
- If white light passes a glass prism it gets refracted twice, first when the light strikes the prism the light ray gets deviated from the air to the glass surface and its speed decreases whereas when the light ray leaves the glass prism it again gets deviated from the glass to the air surface and its speed is increased.
- Inside the glass prism, the speed of the light rays remains constant.
- The surface of the prism is not parallel and hence the light ray does not follow the same path and gets deviated.
This deviation in the white lights makes the spectrum of the light visible and we observe the visible spectrum of the light. For example, the spectrum observed on the oil drop is the visible spectrum of the light.
Dispersion of Light through a Prism
Dispersion of Light happens when white light is split into its constituent hues due to refraction. Dispersion of Light can be achieved through various means but the most common way to achieve dispersion of light is through Prism. Dispersion of light by a prism results in the breaking of white light into its seven constituents.
Dispersion of Light through a prism is achieved by allowing the white light to fall on the prism and passing the light through the prism to break it into its constituent colours. In this article, we will learn about the Dispersion of Light, its experiment and others in detail.
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