A ray is directed at a glass–air interface and total internal reflection occurs at the critical angle. If a thick layer of water is then poured on top of the glass. Which of the following happens? (Remember: Water has an index of refraction between that of glass and air.) A. The ray is still totally internally reflected at the glass interface. B. The ray is now totally internally reflected at the water–air interface. C. The ray is no longer totally internally reflected anywhere. D. The answer depends on the angle of incidence on the glass–water inte
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.
A ray is directed at a glass–air interface and total internal reflection occurs at the critical
angle. If a thick layer of water is then poured on top of the glass. Which of the following
happens?
(Remember: Water has an index of refraction between that of glass and air.)
A. The ray is still totally internally reflected at the glass interface.
B. The ray is now totally internally reflected at the water–air interface.
C. The ray is no longer totally internally reflected anywhere.
D. The answer depends on the angle of incidence on the glass–water interface.
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