A) violet
B) red
C) blue
D) green
Correct Answer: A
Solution :
Since wavelength of violet light is minimum and that of red light is maximum. \[\therefore \] \[{{\lambda }_{R}}>{{\lambda }_{V}}\] From Cauchy's dispersion \[\mu \,\alpha \,\frac{1}{\lambda }\] Hence, \[{{\mu }_{v}}>{{\mu }_{g}},\] i.e., refractive index of glass for violet light is maximum. Therefore, from the formula, \[{{\delta }_{m}}=(\mu -1)A.\]. Where \[{{\delta }_{m}}\] is angle of deviation and A the angle of prism, violet light deviates the most and red the least.You need to login to perform this action.
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