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प्रश्न
उत्तर
According to the principle of reversibility, the path of a light ray is reversible.
For e.g. if light travels from air to water along a certain path, then if the path is reversed while travelling from water to air, it will follow exactly the same path.
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संबंधित प्रश्न
The speed of light in glass is 2 × 105 km/s. What is the refractive index of glass?
How does the angle of minimum deviation produces by a prism change with increase in :
the wavelength of incident light
How does the speed of light change when it passes from glass to water?
The diagram alongside shows the refraction of a ray of light from air to a liquid.
- Write the values of (i) angle of incidence, (ii) angle of refraction.
- Use Snell’s law to find the refractive index of liquid with respect to air.
An object is viewed through a glass prism with its vertex pointing upwards. It appears to be displaced upward. Explain the reason.
Fill in the blank to complete the following sentence:
When light travels from a rarer to a denser medium, it bends ...........
Choose the correct alternative and rewrite the following:
A glass slab is placed in the path of convergent light. The point of convergence of light
What do you understand by the deviation produced by a prism?
Complete the ray diagram showing its emergence into the air after passing through the prism.
