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A point source of light is placed at the centre of the bottom of a jar having a liquid of refractive index 5/3. An opaque disc of radius 1.0 cm is placed on a liquid surface with its centre vertically above the source. What is the maximum height of the liquid for which the source is not visible from above? ANSWER(4/3 cm)

A point source of light is placed at the centre of the bottom of a jar having a liquid of refractive index 5/3. An opaque disc of radius 1.0 cm is placed on a liquid surface with its centre vertically above the source. What is the maximum height of the liquid for which the source is not visible from above? ANSWER(4/3 cm)

Grade:12

1 Answers

sanatan sharma
26 Points
9 years ago

applying the formula    radius of the inverted cone = (height of the object in th optically denser medium)/√(μ2-1)

1 = h/4/3

h=4/3

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