Explain total internal reflection?

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Nilanjana Sanyal

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When a ray of light moves a denser to a rarer medium it bends away from the normal at the point of incidence. That means the angle of refraction > angle of incidence. Now if we go on increasing the angle of incidence, at a particular value of the incidence angle, the corresponding angle of refraction...
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When a ray of light moves a denser to a rarer medium it bends away from the normal at the point of incidence. That means the angle of refraction > angle of incidence. Now if we go on increasing the angle of incidence, at a particular value of the incidence angle, the corresponding angle of refraction becomes equal to 90 degrees and the refracted ray of light grazes the surface of separation. This value of the angle of incidence is known as the critical angle. If we continue to increase the angle of incidence beyond the critical angle, the ray of light do not enter the rarer medium but is totally reflected internally in the denser medium. This is known as the phenomenon of total internal reflection.For a total internal reflection to take place, (i) the light ray should pass from a denser to a rarer medium and (ii) the angle of incidence should be greater than the critical angle for the two given media. Two examples of total internal reflection are (a) mirage and (b) sparkling of diamonds. read less
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B.tech with 3 years of Industry experience in Emebedded Systems and Telecom. Prior teaching experience 3 years

Total internal reflection is an interesting phenomenon that occurs when a travelling wave strikes the boundary between two mediums, at a greater angler than the critical angle wrt the normal to the surface. If the RI of the 2nd medium is lower and the incident angle is greater than the critical angle,...
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Total internal reflection is an interesting phenomenon that occurs when a travelling wave strikes the boundary between two mediums, at a greater angler than the critical angle wrt the normal to the surface. If the RI of the 2nd medium is lower and the incident angle is greater than the critical angle, the wave cannot pass through and is entirely reflected. read less
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When light is incident upon a medium of lesser index of refraction, the ray is bent away from the normal, so the exit angle is greater than the incident angle. Such reflection is commonly called "internal reflection". The exit angle will then approach 90° for some critical incident angle ?c , and for...
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When light is incident upon a medium of lesser index of refraction, the ray is bent away from the normal, so the exit angle is greater than the incident angle. Such reflection is commonly called "internal reflection". The exit angle will then approach 90° for some critical incident angle ?c , and for incident angles greater than the critical angle there will be total internal reflection. read less
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Science and mathematics

It is total internal refraction not reflation.
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Tutor

The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.
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TIR is an optical phenomenon in which, if angle of incidence increases the critical angle then the light ray gets reflected from the denser mediums boundary instead of getting refracted. On refraction the rays becomes dimmer while on contrary on reflection the ray becomes stronger. TIR can be observed...
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TIR is an optical phenomenon in which, if angle of incidence increases the critical angle then the light ray gets reflected from the denser mediums boundary instead of getting refracted. On refraction the rays becomes dimmer while on contrary on reflection the ray becomes stronger. TIR can be observed in resplendence of a well cut diamond where it sparkles because of TIR. read less
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I m good at Mathematics and Chemistry plus Mechanics

The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.
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When a ray / beam of light passes from a denser medium to rare medium at an angle greater than critical angle, ray reflects back in the same medium. This phenomenon of reflecting back in the same medium is known as TIR. Optical fiber follows TIR.
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When a wave passes from a medium of higher to lower refractive index and if the angle of incidence is greater than critical angle, wave totally reflects back, phenomenon is known as total internal reflection.
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Maths Magician

In order for total internal reflection to take place:- 1.The rays of light must travel from a dense medium to a less dense medium. 2.The angle of incidence must be greater than the critical angle.
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