What Is Dispersion In Physics?
While light consists of seven colours – violet, indigo, blue, green, yellow, orange, and red. These colours are called the spectrum of the white light. Violet has the minimum wavelength (or maximum frequency) and red the maximum wavelength (or minimum frequency). In a vacuum, all these colours travel with the same speed but in a transparent medium they have different speeds. Violet travels the slowest through glass while red travels the fastest. Due to different speeds, the colours are refracted through different angles and, therefore, when a narrow beam of white light passes through a glass prism, it is split up into its constituent colours. This separation of light into colours is called dispersion. The most spectacular illustration of dispersion is the rainbow. When the sun shines soon after a shower of rain, a rainbow is seen in the opposite the sun. The beautiful colours of the rainbow are due to the dispersion of sunlight by water droplets suspended in the air after rain. The dro
