In which material do you think light rays travel faster-glass or air?

A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?

As light rays pass from water into glass, are they refracted towards the normal or away from the normal?

Which phenomenon of light makes the water to appear shallower than it really is?

State whether the following statement is true or false: Refraction occurs because light speeds up in denser materials.