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51°, 43°, 41, Sunlight, Since parabolic mirrors are used in telescope in this, elescope so defects of chromatic aberration and spherical, aberration are removed., Rainbow:-, When sunlight's falls on droplets than spectrum of, sunlight in concentric are shape (or in shape of bows), is formed in the sky which is called rainbow,, two types of rainbows are seen in sky an inner rainbow, having violet color on it inner edge is called primary rainbow,, outer rainbow having red color on inner edge is called, secondary rainbow., Secondary, Primary, 54°, Observer, (i) Formation of Primary Rainbow: -, It is form due to two times refraction and one, time total internal reflection of sun light from, the droplets, when white light enter in the, droplet then it gets refracted, different color, are refracted at different angle these refracted, rays gets totally internally reflected from back, surface of droplets, these different color are, again refracted when they comes out from, droplets, here violet color band most and, reach observer eye form the droplets at in, lower height in the sky on the other hand red, color band least and reach the observer eye, from the droplets at higher height in the sky,, other color seen at intermediate angles, Sunlight, Resd, Violet, 142' Violet, Red, Water, doup, (ii) Formation of Secondary Rainbow: -, It is formed due to two time refraction and two time total, internal reflection of sunlight from the droplets, here light, rays enter in droplets from the bottom of drop, when white, light enter in the droplet then it gets refracted, different, color are refracted at different angle these refracted rays, gets totally internally reflected two times from back surface, of droplets, these different color are again refracted when, they comes out from droplets, here red color band most and, reach observer eye form the droplets at in lower height in, the sky on the other hand violet color band least and reach, the observer eye from the droplets at higher height in the, sky, other color seen at intermediate angles., Sunlight, R., Important numerical : ex.11.2, ex.11.4, ex.11.8, ex. 11.10, ex.11.14, ex.11.16, ex.11.23, ex.11.25, ex.11.26, Q.7. Q.8, Q.6, Q.9,, ARVIND SHARMA,1-BA-14,Gaytri Nagar, H.M., Sec. 5,Udaipur. Tel.- 9214467347, 19