Wave OpticsHard
Question
In Young′s double slit experiment, one of theslit is wider than other, so that the amplitude ofthe light from one slit is double of that fromother slit. If Im be the maximum intensity, theresultant intensity I when they interfere at phasedifference φ is given by :
Options
A.
B.
C.
D.
Solution
Imax = 
= 9I = Im ⇒ I 
IP = I + 4I + 2
= 5I + 4I cosφ
= I + 4I (1 + cosφ)
= I + 8I
= 9I = Im ⇒ I IP = I + 4I + 2
= 5I + 4I cosφ
= I + 4I (1 + cosφ)
= I + 8I
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