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A beam of light of wave length 600 nm fr...

A beam of light of wave length 600 nm from a distance source fall on a single slit 1mm wide and a resulting. Diffraction pattern is observed on a screen 2m away. The distance between the first dark fringes on either side of central bright fringe is

A

1.2cm

B

1.2mm

C

2.4cm

D

2.4mm

Text Solution

Verified by Experts

The correct Answer is:
D
For first dark fringe, in diffraction pattern,
`dsintheta=lamda`

or `d((y)/(D))=lamda or y=(Dlamda)/(d)` or Distance`=(2Dlamda)/(d)`
or Distance`=(2xx(2)(600xx10^(-9)))/(1xx10^(-3))m`
`=2.4xx10^(-3)m=2.4mm`
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