Question

A diffraction pattern is obtained by making blue light incident on a narrow slit if blue light is replaced by red light then the diffraction bands ​

Answer 1

Answer:

The width of the fringe in diffraction pattern is given as $$\dfrac{D\lambda}{d}$$

Hence when the red light is replaced by blue light, the wavelength decreases which means that the fringe width decreases and pattern becomes narrower and crowded together

Explanation:

plzz mark as BRAINLIEST

Answer 2

Explanation:

The fringe width in diffraction pattern is  d sinθ = nλ

here d is the slit width and d sinθ is the path difference between the waves . θ the the angle formed by fringe width at the center of slit .

Thus the angle θ depends on the wavelength . As the wavelength increases , the angular separation also increases . Thus the fringe width will increases , when violet light is replaced with red .