MHT CET202123 Sep 2021Morning ShiftPhysicsWave OpticsActual
In Yong's double slit experiment, in interference pattern, a minimum is observed exactly in front of one slit. The distance between the two coherent source is ' d ' and ' D ' is the distance between the source and screen. The possible wavelength used are inversely proportional to
Options
- AD , 5 D , 9 D
- BD , 3 D , 5 D
- C3 D , 4 D , 5 D
- D3 D , 7 D , 10 D
Correct answer
B. D , 3 D , 5 D
Step-by-step solution
If x is the fringe width, then three will be a minimum in front of the slit if aligned & d 2 = x 2 , 3 x 2 , 5 x 2 , & or d = x , 3 x , 5 x . & x = d , d 3 , d 5 , & = xd D & = d ^2 D , d ^2 3 D , d ^2 5 D aligned is inversely proportional to D , 3 D , 5 D