Question

Why a glass rod immersed in a glyserine becomes invisible???

Answer 1

When light refracts from two different substances with the same index of refraction, the materials cannot be distinguished from one another. Since glass and glycerin have the same refractive index, a glass object in glycerin is invisible.

Answer 2

Wow man awesome queation......When light refracts from two different substances with the same index of refraction, the materials cannot be distinguished from one another. Since glass and glycerin have the same refractive index, a glass object in glycerin is invisible. This is actually demonstrated in this eerie video: The large beaker is filled with glycerin or oil, a Pyrex glass rod is lowered in the beaker. It is indeed invisible! Amazing science!