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प्रश्न
When light travels from a rarer to a denser medium, its speed ______.
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उत्तर
When light travels from a rarer to a denser medium, its speed decreases.
संबंधित प्रश्न
Define refraction and state the laws of refraction.
If the speed of light in vacuum is 3 × 108 ms−1, find the speed of light in a medium of absolute refractive index 1.5.
An object is viewed through a glass prism with its vertex pointing upwards. It appears to be displaced upward. Explain the reason.
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
Trace the path of a ray of light incident at an angle of 45° on a rectangular glass slab. Write the measure of the angle of refraction, the angle of emergence and the lateral displacement suffered by the ray as it passes through the slab.
In the fig. name the ray which represents the correct path of light while passing through a glass block.
Define the term refractive index of a medium in terms of velocity of light.
How is the refractive index of a medium related to its real depth and apparent depth?
What do you understand by the deviation produced by a prism?
