Question

What is meant by refractive index of a material? How would you determine the refractive index of a rectangular glass slab?​

Answer 1

Explanation:

Determining the Refractive Index of Glass Introduction: The refractive index of a material is also known as the ratio of the sine of the incident angle for light in a vacuum (air) to the sine of the refracted angle in that material. Snell’s law allows us to

Answer 2

The correct answer to the above question is as follows -

Refractive index -

• The refractive index of the material is the measure of the bending of light when it passes from one medium to another.
• It is the ratio of the velocity of light in a vacuum to the speed of light in that medium. It is a ratio and hence is dimensionless.

Refractive index of a rectangular glass slab -

• The refractive index of the gass slab is the ratio of real thickness of the slab to the apparent thickness of the slab.

• When a ray of light gets incident on the glass slab, it gets refracted through the material, and then strikes the end of the slab and again get refracted out the material.
• The refractive index will be calculated by = real thickness of the slab/apparent thickness of the slab.