need it very fast!

Asked by  | 23rd Mar, 2010, 10:49: PM

Expert Answer:

When a ray of light strikes a medium boundary at an angle larger than a particular angle called critical angle with respect to the normal to the surface, it'll not be refracted into another medium but instead will be reflected back in the same medium.

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Answered by  | 24th Mar, 2010, 08:43: AM

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