Question
Question: In the YDSE apparatus shown in the fig Dx is the path difference between S<sub>2</sub>P and S<sub>1<...
In the YDSE apparatus shown in the fig Dx is the path difference between S2P and S1P. Now a glass slab is introduced in front of S2 then the number of fring between O and P will –
A
Increase
B
Decrease
C
Many increase or decrease depends upon Dx
D
Remains constant
Answer
Remains constant
Explanation
Solution
Due to introduction of glass slab, number of fring between two points remains constant because if n number of fring crosses point P, then same number of fring also crosses point O in same sence