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प्रश्न
Calculate the speed of light in a medium whose critical angle is 30° ?
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उत्तर
Speed of light in the medium =`\text { Speed of light in air}/ text { Refractive index of the medium with respet to air}`
`=(3 xx 10^8 m/s)/(1/(sin30°)`
`= (3 xx 10^8 m/s)/2`
`=1.5 xx 10^8m/s`
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संबंधित प्रश्न
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
(a) A ray of monochromatic light enters glass PQRS as shown in the fig. Complete the path of ray till it emerges from the glass. (Critical angle of glass is 420).
(b) Draw diagram of a prism periscope.
(c) What are the advantages of total internal reflecting prism over plane mirror?
Make the correct choices for each of the following :
Total Internal reflection takes place when
(where ∠i = angle of incidence, ∠r = angle of refraction, ∠C = critical angle)
Why do diamonds sparkle?
Name the factors affecting the critical angle for the pair of media.
What is meant by the term ‘critical angle’?
A ray of light passes through a right-angled prism as shown in the figure. State the angles of incidence at the faces AC and BC.
What are the conditions to achieve total internal reflection?
What are the examples of total internal reflection in nature?
Find the value of θ in the given figure.
