The angle of minimum deviation for a `75^(@)` prism of dense glass is found to be `45^(@)` when in air and `15^(@)` when immersed in certain liquid. The refractive index of the liquid is

A glass lens of refractive index 1.45 disappears when immersed in a liquid. What is the value of refractive index of the liquid ?

A glass of refractive index 1.45 disappears when immersed in a liquid. What is the value of refractive index of the light?

The minimum deviation produced by a hollow prism filled with a certain liquid to be 30^(@) . The light ray is also found to be refracted at angle 30^(@) . The refractive index of the liquid is