Question

For a double slit experiment the necessary equation representing the coherent sources are y1=10sinωt and y2=10sin(ωt - π/6) then the value of intensity of bright fringes will be
a)20
b) 400
c)100
d)200

Answer 1

y

1

=asinwty

2

=asin(wt+δ)

Resultant =(a

2

+a

2

+2×a×acosδ)

=2a

2

+2a

2

cosδ)

=2a

2

×2cos

2

(

2

δ

)

=4a

2

cos

2

(

2

δ

)