Question
Physics Question on Ray optics and optical instruments
The face difference(∆ф) between two superimposing waves to obtain constructive interference and his right band is :
A
∆ф=np;n=1,2,3,4,5
B
∆ф=2np;n=0,2,3,4,5
C
∆ф=nπ/2;n=1,2,3,4,5
D
∆ф=3nπ/2;n=1,2,3,4,5
Answer
∆ф=2np;n=0,2,3,4,5
Explanation
Solution
The correct answer is (B): ∆ф=2np;n=0,2,3,4,5