JEE PHYSICS MCQ: RAY OPTICS

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Understanding +4 | -1

In the visible region, the dispersive powers and the mean angular deviation for crown, and flint glass prisms are

\omega

and

\omega^{\prime}

and

d

and

d^{\prime}

respectively. When the two prism are combined, the condition of zero dispersion by the combination is

View answer and explanation

Correct option: C

(\omega d)^2+\left(\omega^{\prime} d^{\prime}\right)^2=0

Option B (

\omega d+\omega^{\prime} d^{\prime}=0

) is correct because the condition for zero dispersion is that the net angular dispersion is zero, which means the dispersive powers and mean deviations must satisfy this equation.

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