Diffraction of blue and red light on a prism

[khondowe]

Could someone help me with the path taken by the emergent ray for blue light if it is refracted most than red light rays.the emergent ray for the red light lies on the boundary of the prism after being diffracted and forms the criticle angle(c). Is the path taken by the refracted blue light ray going to towards the normal,away or there's going to be total internal refraction?

 

[NascentOxygen]

Its angle of incidence is too large for it to pass through that face.

 

[grzz]

Note that the refractive index itself, and hence the critical angle for blue, depends on the wavelength of blue light.

 

[grzz]

May I suggest that the term 'diffraction' in the title of the post be changed to 'refraction'.

 

[sardar]

The path taken by the emergent ray for blue light will depend on the angle at which the light enters the prism and the refractive index of the prism material. If the blue light enters the prism at an angle greater than the critical angle, it will undergo total internal reflection and travel along the boundary of the prism. If the angle of incidence is less than the critical angle, the blue light will be refracted towards the normal as it exits the prism. The exact path of the refracted blue light will also depend on the shape and thickness of the prism. It is important to note that the refractive index of a material is wavelength-dependent, so the path of the refracted blue light may differ from the path of the refracted red light due to their different wavelengths.