Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
Figure P22.16 shows a light ray traveling
in a slab of crown glass surrounded
by air. The ray is incident
on the right surface at an angle
of 55° with the normal and then
reflects from points A, B, and C.
(a) At which of these points does
part of the ray enter the air? (b) If
the glass slab is surrounded by carbon
disulfide, at which point does
part of the ray enter the carbon
disulfide?
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