A combination of two prism one of flint &other of crown glass produces dispersion without deviation.The angle of the flint glass prism is 15degree . Calculate the angle of crown glass prism & the dispersion separation of red & violet rays an emergence from spectroscope.refra. index of glass=1.52,re.index of flint=1.62,dispersive power of glass=0.02,dis.power of flint=0.03.
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huh?