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STD 12 - 9. Ray optics abd optical instruments — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 9. Ray optics abd optical instruments4 Marks
Question
In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are $\omega , \omega '$ and $d, d' $ respectively. The condition for getting deviation without dispersion when the two prisms are combined is
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Answer

(c) ${\theta _{net}} = \theta + \theta ' = 0$$ \Rightarrow \omega d + \omega 'd' = 0$

($\theta $= Angular dispersion =$\omega .\;{\delta _y}$)

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