Question

Two coherent sources whose intensity ratio is 36:1 produce interference fringes. Deduce the ratio of maximum intensity to minimum intensity

Answer 1

Answer:

Explanation:

It is given that  

I

2

​

I

1

​

​

=

1

81

​

Since,  

I

2

​

I

1

​

​

=

A

2

2

​

A

1

2

​

​

It is given that, ratio of intensities of maxima and minima is  

y

x

​

So,

y

x

​

=

(

I

1

​

​

−

I

2

​

​

)

2

(

I

1

​

​

+

I

2

​

​

)

2

​

y

x

​

=

(

81

​

−1)

2

(

81

​

+1)

2

​

y

x

​

=(

8

10

​

)

2

y

x

​

=

16

25

​

So, x−y=9