The refractive index of a piece of transparent quartz is the greatest for

Refractive index of a transparent material is :

The refractive index of a transparent medium is always greater than ____

The refractive index of a transparent medium is always greater than __________.

What should be the refractive index of a completely transparent medium for it to be invisible in vacuum ?

What will be the refractive index of a transparent medium if the speed of light in the transparent medium is found to be 2.4 xx 10^(8) m//s ?

Refractive index of the material of any transparent medium is