Question

Q.24] The intensity of the light coming from one of the slits in Young's experiment is twice the intensity of the light coming from the other slit. What will be the approximate ratio of the intensities of the bright and dark fringes in the resulting interference pattern?​

Answer 1

Explanation:

Let the intensity of light coming from one slit I

1

=I

Intensity of light coming from other slit I

2

=2I

Maximum intensity I

max

=(

I

1

+

I

2

)

2

Or I

max

=(

I

+

2I

)

2

=(

2

+1)

2

I

Minimum intensity I

min

=(

I

2

−

I

1

)

2

Or I

min

=(

2I

−

I

)

2

=(

2

−1)

2

I

Ratio

I

min

I

max

=

(

2

−1)

2

(

2

+1)

2