Question

A leamons kept in a glass of water appears to be enlarged

Answer 1

becoz water molecules gets trapped in it

Answer 2

When we put a lemon in a glass of water, the light rays gets refracted. This refraction causes the bending of rays and results in the diverging image. That is an object that is placed inside water will now appear diverged from its original appearance and in case of lemon it will appear bigge.