Question

A bubble of air rising up from a water tank appears silvery when viewed from top.

Answer 1

this is due to total internal reflection and wave theory of light.

Answer 2

HEYA MATE HERE U GO

when the rays of light travelling through water, strike the water air interface of the bubble at an angle, which is greater than critical angle for water, they get totally internally reflected. these reflected rays on reaching the eye appear to come from air bubble, which in turn appears silvery.

HOPE THIS WILL HELP U

#ANAYAPRINCESS