Answers

2014-10-16T20:43:04+05:30
Total internal reflection:the complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle is known as total internal reflection.
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2014-10-18T20:20:31+05:30
When a ray of light is passed from a rarer  medium to adenser medium and if the angle of incidence is greater than the critical angle ,then there will be no refracted ray only the reflected ray .this phenomenon is called total internal reflection
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