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Questions  >>  CBSE XII  >>  Physics  >>  Wave optics
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In a single slit diffraction experiment , first minimum for red light $(660 nm)$ coincides with first maximum of some other wavelength $ \lambda$ calculate $\lambda$. calculate $\lambda$

$\begin{array}{1 1} 400 \;nm \\ 4000\;nm \\ 440\;nm \\ 4400 \;nm \end{array} $

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