Light and optic: refractive index, snell's law, real /apparent

The speed of the light that propagates through a medium is 1.24 x 10^6 ms-1. Calculate the refractive index of the medium. Given the speed of light in vacuum is 3.0 x 10^8 ms-1

Answer explanation

n = c / v

What is the speed of light in a medium with refractive index of 1.47?

Answer explanation

cm = c / v

Diagram 1.1 shows a ray of light entering from air into water.

Based on Diagram 1.1 (i) ,

Compare the speed of light in water with the speed of light in air.

Diagram 1.1 shows a ray of light entering from air into water.

Based on Diagram 1.1,

If the water is replaced with liquid Y which is optically denser than water, state the change in direction of bending of light in the liquid Y.

Diagram 1.1 shows a ray of light entering from air into water.

Based on Diagram 1.1,

Name the phenomenon shown in Diagram 1.1.

Diagram show a light ray propagating through a glass block. The refractive index of the glass is 1.52.
What is the angle of incident

• 27.7 degree

• 47.7 degree

• 49.4 degree

• 77.7 degree

Diagram 1.2 shows a coin at the base of the beaker which contains a liquid Z with the depth of 15 cm.

The observer found the image of the coin appears to be 4 cm from the base of the beaker.

(i) Calculate the refractive index of the liquid Z.

Diagram 1.2 shows a coin at the base of the beaker which contains a liquid Z with the depth of 15 cm.
The observer found the image of the coin appears to be 4 cm from the base of the beaker.

The liquid Z is replaced with optically less dense liquid. What happens to the image of the coin?