why do diamond sparkle
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because it is having many cuts
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If the slowly cleft test tube lying in the beaker filled with water increases the angle of incidence of light which is being disrupted at.
This angle is more than the revolutionary angle (41°) of the glass-air and in the air inside the light test tube. Could not go but reached the eye by completing the test tube wall, due to which the test tube appears to look like a silver .
If the water is full in the test tube, then the test tube is shiny Minister does not appear because the glass critical angle for the mass, glass - is enormous dislocated critical angle of air. In this situation, complete reflection of light can not be attained.
This angle is more than the revolutionary angle (41°) of the glass-air and in the air inside the light test tube. Could not go but reached the eye by completing the test tube wall, due to which the test tube appears to look like a silver .
If the water is full in the test tube, then the test tube is shiny Minister does not appear because the glass critical angle for the mass, glass - is enormous dislocated critical angle of air. In this situation, complete reflection of light can not be attained.
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