1.

The light of wavelength\[6328\,\,{AA}\]is incident on a slit of width 0.2 mm perpendicularly, the angular width of central maxima will be                                   [MP PMT 1987; Pb. PMT 2002]

A. \[{{0.36}^{o}}\]                   
B. \[{{0.18}^{o}}\]
C. \[{{0.72}^{o}}\]                   
D. \[{{0.09}^{o}}\]
Answer» B. \[{{0.18}^{o}}\]


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