Which of the following equations gives the condition for the th dark fringe…

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

Which of the following equations gives the condition for the

m

th dark fringe (diffraction minimum) produced by monochromatic light of wavelength

\lambda

passing through a single slit of width

a

at angle

\theta

? (a)

a\sin\theta = \left(m+\dfrac{1}{2}\right)\lambda

(b)

a\cos\theta = m\lambda

(c)

a\sin\theta = m\lambda

(d)

a\sin\theta = \dfrac{m\lambda}{2}