Question

If a yellow light with a wavelength of 540nm shines on a double slit with the slits cut 0.01 mm apart,then at what angle a person should look away from the central fringe to see the 2nd order fringe?

Answer 1

Answer:

Explanation:

Given If a yellow light with a wavelength of 540 nm shines on a double slit with the slits cut 0.01 mm apart,then at what angle a person should look away from the central fringe to see the 2nd order fringe?

Now we need to convert nm to m and mm to m. So it will be  λ = 5.4 x e ^-7, n = 2,   d = 1.00 x e^-5

We know that

  λ = d sin θ / n

 sin θ = λ n / d

 sin θ = 540 e^-9 x 2 / 1.00 e^-5

 So θ = 6.2 degrees