1.

In a single slit diffraction experiment first minimum for red light (660 nm) coincides with first maximum of some other wavelength l'. The value of l' is

A. \[4400\,\,{AA}\]
B. \[6600\,\,{AA}\]
C. 1 rad
D. \[3500\,\,{AA}\]
Answer» B. \[6600\,\,{AA}\]


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