A magician during a show makes a glass lens `mu = 1.5` disappear in a through of liquid. What is the refractive index of the liquid ? Is the liquid water ?

A magician during a show makes a glass lens with n=1.47 disappear in the trough of liquid. What is the refractive index of the liquid.

A magician during a show makes a glass lens with n = 1.47 disppear in a trough of liquid:-What is the refractive index of the liquid?

A magician during a show makes a glass lens with n = 1.47 disappear in a through of liquid. What is the refractive index of the liquid ? Could the liquid be water ?

A magician during a show makes a glass lens with n = 1.47 disappear in a trough of liquid. What is the refractive index of the liquid? Could the liquid be water?

A magician during a show makes a glass lens with n = 1.47 disappear in a trough of liquid. What is the refractive index of the liquid ? Could the liquid be water ?

A magician during a show makes a glass lens with n=1.47 disappear in a trough of liquid. Refractive index of the liquid is

A magician during a show makes a glass lens with refractive index n = 1.47 disappears in a trough of liquid. What is the refractive index of the liquid ? Could the liquid be water ?