A girl was playing with a thin beam of light from her laser torch by directing it from different directions on a convex lens held vertically.She was surprised to see that in a particular direction the beam of light continues to move alng the same direction after passing through the lens state the reason for this observation
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she wold have placed such that the angle is greater than critical angle causing total internal reflection
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she wold have placed such that the angle is greater than critical angle causing total internal reflection
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