What is glass?

What does glass consists of? What mixed compound is used to prepare yellow, blue and green coloured glass?

Refractive index of glass is 1.5. What is the velocity of light in glass?

What makes glass different from a solid such as quartz? Under what Conditions Could quartz be Converted into glass?

Answer the following questions: What is a silvered glass mirror? Name the scientist who made it.

If the polarising angle for air-glass interface be 56^(@) , what will be the angle of refraction in glass?

A glass slab of thickness 4 cm contains the same numbers of waves as 5 cm of water when both are traversed by the same monochromatic ray of light. The refractive index of water is 4//3 , what is that for glass ?