Q.

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

see full answer

Want to Fund your own JEE / NEET / Foundation preparation ??

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*
An Intiative by Sri Chaitanya

a

1.2 cm

b

1.2 mm

c

2.4 cm

d

2.4 mm

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Here, λ=600nm=600×10-9 ma=1 mm=10-3 m,D=2 mDistance between the first dark fringes on either side of the central bright fringe is also the width of central maximum.  Width of central maximum =2λDa=2×600×10-9 m×2 m10-3 m=24×10-4 m=2.4×10-3 m=2.4 mm
Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon