Which of the following does not involve Total Internal Reflection?
Options
AMirages in Deserts
BKaleidoscope
CDiamond Sparkle
DTransmission of light rays in optical fibres
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Correct Answer
BKaleidoscope
Model Answer
Total Internal Reflection
It is the phenomenon that occurs when the light rays travel from a more optically denser medium to a less optically denser medium.
Following are the two conditions of total internal reflection:
The light ray moves from a more dense medium to a less dense medium.
The angle of incidence must be greater than the critical angle.
Examples of Total Internal Reflection
Diamond Sparkle
Transmission of light rays in Optical Fibres
Mirages in Deserts
Kaleidoscope
The phenomenon is popularly known as the 22-degree circular halo of the sun or occasionally the Moon (also called a moon ring or winter halo), occurs when the sun’s or moon’s rays get deflected/refracted through the hexagonal ice crystals present in cirrus clouds. Hence, Kaleidoscope does not involve total internal reflection.
A diagram of a ray passing from water into air, at the critical angle and with total internal reflection, with the angles marked.
