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प्रश्न
Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen. When is the glass piece not seen?
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उत्तर
The glass piece is not seen when the refractive index of liquid becomes equal to the refractive index of glass.
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संबंधित प्रश्न
When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way
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The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°, Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.

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- In the diagram show the approximate direction of these rays as they emerge out of the block.
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`("Take" sin 42° =2/3)`
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- the angle of refraction and
- the angle of deviation for the ray?
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Can the absolute refractive index of a medium be less than one?
What is the total reflecting prism?
In what condition a prism is said to be in the position of minimum deviation? What is the direction of the refracted ray inside the prism in this condition?
