Question

What will be the effect on the interference fringes,if red light is replaced by blue light?

Answer 1

$\textbf{Hey there}$!!

$\textbf{Answer}$:

The wave length of the blue light is smaller than that of red light.

We Know,

β = $\frac{Dλ}{d}$

Therefore, when red light is replaced by blue light, the fringe width will decrease.

Be Brainly.

@karangrover12.

Answer 2

● The fringe width and interference will decrease if if the red light it is replaced by the blue light from the source.

● This is because blue light wavelength is lower and its intensity is is low when compared to red light.

● As the wavelength of the light is directly proportional to the fringe width of the wave.