The width of a slit is 0.012 mm. Monochromatic light is
incident on it. The angular position of first bright line is
5.2º. The wavelength of incident light is
[sin 5.2º = 0.0906].
(a) 6040 Å (b) 4026 Å
(c) 5890 Å (d) 7248 Å
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