1.

The deviation caused for red, yellow and violet colours for crown glass prism are `2.84^(@),3.28^(@)` and `3.72^(@)` respectively. The dispersive power of prism material is:A. `(11)/(41)`B. `(92)/(250)`C. `(117)/(250)`D. `(22)/(57)`

Answer» Correct Answer - A
Dispersive power is given by
`omega=(delta_(v)-delta_(r))/(delta_(y))=(3.72-2.84)/(3.28)=(11)/(41)`.


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