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Solar radiation consists of a bundle of rays of radiant energy of different wave lengths. The sun emits radiant energy in the form of electromagnetic waves. The visible portion of the solar spectrum appears as light.
Light travels with a speed of 2, 97,600 km/ sec. It takes 8 minutes to 20 second. Reach the earth.
Light is the total effect of the combination of the seven different colours, namely red, orange, yellow, green, blue, indigo and violet. (VIBGYOR). The waves that produce the effect of red colour are the longest and those producing the violet are the shortest. Waves shorter than the violet are called ultraviolet rays, while those longer than the red are known as infra red rays. The ultra violet waves form only 6 per cent of the insolation, but have strong photochemical effects on some substances. The infra-red rays, even though invisible, form 43 per cent of the insolation.
They are largely absorbed by water vapour that is concentrated in the lower atmosphere.
francis1897 answered the question on January 11, 2023 at 06:48