Angular width of a central max. is 300 when the slit is illuminated...

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Angular width of a central max. is 300 when the slit is illuminated by light of wavelength \( 6000 \AA \). Then width of the slit will be approx.
(a) \( 12 \times 10^{-6} \mathrm{~m} \)
(b) \( 12 \times 10^{-7} \mathrm{~m} \)
(c) \( 12 \times 10^{-8} \mathrm{~m} \)
(d)
\( 12 \times 10^{-9} \mathrm{~m} \)
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