Question

Which variety of glass is used for manufacture of optical glasses?
A) Sodium glass
B) Flint glass
C) Ground glass
D) Quartz

Answer 1

The question talks about the ability and the type of glass that can be effective for use in reducing rays from the sun and also how the thickness can help to reduce rays of beam of light from any light source.

Complete step by step answer:
Option B is correct. Flint glass owns an outstanding property of absorbing UV (Ultraviolet light) or radiant light from the sun and as such disperses or scatters the light into a spectrum more strongly and also its heavy nature in terms of density and refractive index(its ability to bend light rays).
An example can be seen from a boy reading with the laptop, where rays are emitted always, this will continue except a glass of flint type is used to help reduce or prevent the rays from the laptop and phones too.
Snell’s law explains that light travels from a less dense medium to a denser or heavier medium through a refraction process because their nature in terms of thickness is not the same.
Light is also plane polarized by the action of the glass and instead of light rays being random it assists it to be arranged in an orderly way.
Ground glass is opaque in nature and cannot be used in making optical glasses.
Therefore, the correct option is Option B.

Note: Other objects that must refract light but be dense (heavy) to be able to scatter light, where light travels from air to glass or glass to water, it therefore accounts for light.