How Does Glycerine Make a Bottle Invisible?

[DavidSnider]

http://www.youtube.com/watch?v=anJuZdL_vsw&feature=fvhl

What is going on here?

 

[turbo]

Refractive index. Some liquids have refractive indices very close to those of some glasses, crystals, and other transparent solids, and the solids can appear to disappear when immersed in them. Refraction occurs at surfaces when the indices of refraction differ, but not when they are the same (or at least very close).

 

[sir-pinski]

It seems like the video is showing a demonstration of an invisible bottle of glycerine. The bottle is filled with glycerine, which is a clear, odorless liquid commonly used in various beauty and skincare products. However, the bottle itself is not visible, making it appear as if the glycerine is floating in mid-air.

This optical illusion is achieved by using a special type of glass called "index-matched glass," which has the same refractive index as glycerine. This means that light passes through both substances at the same speed, making the bottle and the liquid inside appear invisible.

The video is a creative and fascinating way to showcase the properties of glycerine and how it interacts with light. It also serves as a reminder that things are not always as they seem and that there is often more than meets the eye.

Overall, it's a fun and interesting video that highlights the wonders of science and the power of perception.