Saritha took an opaque vessel. Placed a coin at its bottom. She asked Neenu to walk backwards looking at the coin. Saritha asked Neenu to stop at the place where the coin disappers. Now saritha added water into the vessel without moving the coin.
1. What is observed here?
a. The coin seems to be lifted up
b. Still the coin can't be seen.
2. What is the reason for this observation?
a. Due to reflection
b. Due to refraction
3. As light from the coin comes from dense to rarer medium it bends
a. Away from the normal
b. Towards the normal
4. Which is the denser medium?
a. Air
b. Water
5. The refractive index from air to glass is 1.5 and the refractive index of water is 1.33. What is the refractive index from glass into water?
a. 1.13
b. 0.89
c. 2.00
d. 0.50
