The diagram shows two rays of light entering a glass block.

The diagram shows a ray of light entering a glass block of refractive index 1.41 at an angle of incidence 45o

The diagram shows the path of a ray of light travelling towards and into the a pool of water. Four angles are labelled.

Which diagram shows what happens to a ray of light when it passes from air into a block of glass?

The table shows two sets of measurements taken during an experiment in which rays of light are shone at one of the sides of a rectangular block of glass.
| angle of incidence, i | 26.0o | 39.0o |
| angle of refraction, r | 15.5o | 22.5o |
| sin i | 0.438 | 0.629 |
| sin r | 0.267 | 0.383 |
The bottom surface of a glass block is silvered to act as a mirror.

A ray of light travels from air into glass. The angle of incidence is i and the angle of refraction is r.
Which expression is used to calculate the refractive index?
The diagram shows a ray of light moving from air into plastic.

What affects the refractive index of a sample of glass?
A ray of light travels from air into a glass block.
Which diagram correctly shows the path of the ray of light through a glass block?

A ray of light passes from water to air.

Which line shows the path a ray of light would take through a glass block?

Below are diagrams of different shapes and sizes of glasses with a ray of light passing through them from air.

An observer looks straight through a rectangular glass block at an object P, as shown below.
Below is a diagram that shows a ray of light travelling through 3 substances : air,glass and water (necessarily in that order).

When viewed normally, a rectangular block of glass appears to be 0.5 cm thick.
If the refractive index of the glass is 1.5, find the true thickness of the block?
The diagram below shows a ray of light, PQ, incidence on a rectangular glass block.

X is a ray of light entering water.

In which diagram is the path of the light ray not correct?




A ray of light passes into a parallel-sided glass block of refractive index 1.5.
