what is critical angle
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Critical angle :. the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected...
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Critical angle :. the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected...
hope it helps you ..
prashantkumar83417:
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When the angle of incidence in water reaches a certain critical value, therefracted ray lies along the boundary, having an angle of refraction of 90-degrees. This angle of incidence isknown as the critical angle; it is the largest angle of incidence for whichrefraction can still occur.
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here critical material is water u can take
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CRITICAL ANGLE -WHEN A RAY OF LIGHT PASSES FROM A MEDIUM OF HIGHER OPTICAL DENSITY TO A MEDIUM OF LOWER OPTICAL DENSITY ,THE ANGLE OF INCIDENCE AT WHICH THE ANGLE OF REFRACTION BECOMES 90° IS THE CRITICAL ANGLE.
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