Question

A glass rod is almost vanished if dipped in glycerin ----Why???

Answer 1

Glass objects are visible because they reflect some of the light that shines on them and bend or refract the light that shines through them. If you eliminate reflection from and refraction by a glass object, you can make that object disappear. 

Answer 2

Glass object are visible because they reflect some of the light that shines on them and bend or refract the light that shines through them.If you eliminate reflection from and refraction by a glass object, you can make the object disappear