Question

At what angle should a ray of light be incident on the face of an equilateral prism, so that
it just suffers total internal reflection at the other face? The refractive index of the
material of the prism is 1.5.[March 2020]​

Answer 1

Answer:

The incident, refracted, and emergent rays associated with a glass prism ABC are shown in the given figure. = Emergent angle = 90° According to Snell’s law, for face AC, we can have: It is clear from the figure that angle According to Snell’s law, we have the relation: Hence, the angle of incidence is 29.75°.Read more on Sarthaks.com - https://www.sarthaks.com/18753/at-what-angle-should-a-ray-of-light-be-incident-on-the-face-of-a-prism

Answer 2

Answer:

At what angle should a ray of light be incident on the face of an equilateral prism, so that

it just suffers total internal reflection at the other face? The refractive index of the

material of the prism is 1.5.[March 2020]