A parallel beam of light of wavelength 600nm is incident normally on a of width d. If the distance between the slits and the screen is 0.8m and the distance of 2 nd order maximum form the centre of the screen is 15mm. The width of the slit is :
A
40 
B
80 
C
160 
D
200 
Text Solution
Verified by ExpertsThe correct answer is:
B
Distance of 2 nd order maximum from the centre of the screen
Here, 
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