Question

# In the figure, if a parallel beam of white light is incident on the plane of the slits, then the distance of the nearest white spot on the screen from $$O$$ is [assume $$d<<D,\lambda<<d$$]

A
0
B
d/2
C
d/3
D
d/6

Solution

## The correct option is D $$d/6$$The central bright white fringe wold be located at midway between the two slits at point O' as shown in figure.Distance between O and O' $$= \dfrac { 2d }{ 3 } -\dfrac { d }{ 2 } =\dfrac { d }{ 6 }$$ Physics

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