Lightning in general is an electrical discharge caused by positive and negative imbalances within clouds themselves, or between storm clouds and the ground. It's sometimes accompanied by a hissing sound and an acrid odor. The bizarre phenomenon, also known as globe lightning, usually appears during thunderstorms as a floating sphere that can range in color from blue to orange to yellow, disappearing within a few seconds. Instances of ball lightning-glowing, electric orbs in the sky-have captivated and mystified us for centuries. Therefore, when the white light emitted by the Sun falls on the droplets, then the light gets split into several different colours due to the dispersion of light and rainbow get formed. Normally, after rainfall a large number of water droplets get suspended in the atmosphere, these droplets of water function as small Prisms. When it comes to the rainbow, we see it seven colours in the Sky just after the rain when the Sun shines. Īnswer – The formation of rainbow by considering the process of dispersion of light. Question : – Explain the formation of Rainbow. In facts, violet gets scattered even more than blue having a shorter wavelength but our eyes are more sensitive to blue than violet. Since blue has a shorter wavelength than red and is scattered much more strongly. See the sky blue :-ĭue to the dispersion of light, white light is split into several colours such as violet, indigo, blue, green, yellow, orange and red. The amount of scattering is inversely proportional to the fourth power of the wavelength. Light of shorter wavelength is scattered much more than light of longer wavelengths. Scattering of light by atmospheric particle. When the sun light travels through the earth’s atmosphere, it gets scattered ( change its direction ) by the atmospheric particles, then this phenomenon is called scattering of light. Raddish appearance of horizon at sunrise and sunset. The least scattered light ( red ) reaching our eyes, therefore the Sun looks raddish. Most of the blue and other shorter wavelengths are removed by scattering. Īt sunset and sunrise, the Sun’s rays have to pass through a larger distance in the atmosphere. It is a phenomenon of dispersion of light. Raddish appearance of horizon at sunrise and sunset :. In secondary red light from the lower drop enters the observer’s eye and violet is not seen. The intensity of light is reduced at the second reflection and hence the secondary rainbow is fainter than the primary. It is formed due to two refractions and two total internal reflection of light incident on the water droplet. Both primary and secondary rainbows are appear togather but primary occurs inner to the rainbow. Thus the observer see a natural phenomena with red colour on the top and violet on the bottom. The reflected light is refracted again as it comes out of drop. Sun light is first refracted as it enters a rainbow which cause different colours of light are bent through different angles. It is formed due to two refractions and one total internal reflection of light incident on the droplet. It has two parts – primary and secondary.In this phenomena the spectrum of light appearing in the sky, it takes the form of multicoloured circular arc due to the dispersion of light. An observer can therefore see a rainbow only when his back is towards the sun. ![]() The conditions for observing a rainbow are that the sun should be shining in one part of the sky while it is raining in the opposite part of the sky. refraction and reflection of light by spherical water droplets of rain. It is the phenomenon due to combined effect of dispersion of light. Raddish appearance of horizon at sunrise and sunset.There are following natural phenomena of dispersion of light. He called this band of colours the spectrum and the phenomenon is called Dispersion of light. The glass prism split the light into a band of Seven colours on the wall. He passed a beam of Sunlight through a glass prism. Newton discovered that light is made up of seven different colours. It was discovered by Isaac Newton in 1666. Raddish appearance of horizon at sunrise and sunset -ĭispersion of light is the phenomenon of splitting of a beam of white light into its 7 constituent colours when passed through a transparent medium like water droplets or Prism.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |