Physics Past Questions and Answers

The graph above shows the relationship between sin i and sin r for a ray of light in air incident on a liquid surface. If i and r are respectively angles of incidence and refraction, deduce the refractive index of the liquid from the graph

When a ray of light is incident normally on an air- glass interface, its angle of refraction is

A ray of light is incident on a glass block as shown in the diagram above. If the reflected and the retracted rays are perpendicular to each other, what is the refractive index of the glass relative to air.?

When a ray of light is incident normally on an air- glass interface, its angle of refraction is

The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.