Question

Take a transparent glass tumbler and coin. Place the coin on a table
and place glass tumbler on the coin. Observe the coin from the side of the
glass.
Can you see the coin?
Now fill the glass tumbler with water and observe the coin from the
side of the glass tumbler.
Can you see the coin?
Explain why the coin disappears from view.​

Answer 1

Answer:

because of refraction and apperent height