Do activity-7again. How can you find critical angle of water? Explain your steps briefly. (AS3)

Question

Philoid · Accepted Answer

1. Take the cylindrical transparent vessel and put the coin at the bottom of the vessel.

2. Now pour some water in vessel until we get some image of coin on the water surface.

3. The coin is visible only when we pour the water into the vessel. This is because of total internal reflection. The figure below depicts the same.

We know that

⇒

∵ refractive index of water is 1.33.

⇒ c =

c = 48.7^o.

Hence critical angle of water is 48.7^o.