explain the formation of rainbow class 10
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It is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
When sunlight encounters a raindrop, part of the light is reflected and the rest enters the raindrop. The light is refracted at the surface of the raindrop. When this light hits the back of the raindrop, some of it is reflected off the back. When the internally reflected light reaches the surface again, once more some is internally reflected and some is refracted as it exits the drop. (The light that reflects off the drop, exits from the back, or continues to bounce around inside the drop after the second encounter with the surface, is not relevant to the formation of the primary rainbow.) The overall effect is that part of the incoming light is reflected back over the range of 0° to 42°, with the most intense light at 42°.[18] This angle is independent of the size of the drop, but does depend on its refractive index.
When sunlight encounters a raindrop, part of the light is reflected and the rest enters the raindrop. The light is refracted at the surface of the raindrop. When this light hits the back of the raindrop, some of it is reflected off the back. When the internally reflected light reaches the surface again, once more some is internally reflected and some is refracted as it exits the drop. (The light that reflects off the drop, exits from the back, or continues to bounce around inside the drop after the second encounter with the surface, is not relevant to the formation of the primary rainbow.) The overall effect is that part of the incoming light is reflected back over the range of 0° to 42°, with the most intense light at 42°.[18] This angle is independent of the size of the drop, but does depend on its refractive index.
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After a pour of rain tiny droplets of water remain high up in the atmosphere and each one of those behave as a prism and hence they split the light....forming a rainbow...remember it always takes place oppisite to the possition of the sun..and know the best part u can create ur very own rainbow.....take a water sprayer go outside on a brigth sunny day and spray the water out.remember to spray it opposite to where the sun is.......the principle is same here....:-)
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