Question

Light of wavelength 6328 Å is incident normally on a slit
having a width of 0.2 mm. The angular width of the central
maximum measured from minimum to minimum of diffraction
pattern on a screen 9.0 metres away will be about
(a) 0.36 degree (b) 0.18 degree
(c) 0.72 degree (d) 0.09 degree

Answer 1

Answer:

d is the answer of your question