मराठी

The Diagram Below Shows a Point Source P Inside a Water Container. Four Rays A, B, C, D Starting from the Source P Are Shown Upto the Water Surface - Physics

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प्रश्न

The diagram below shows a point source P inside a water container. Four rays A, B, C, D starting from the source P are shown up to the water surface

1) Show in the diagram the path of these rays after striking the water surface.

The Critical Angle for the water-air surface is 48°.

2) Name the phenomenon which the rays B and D exhibit.

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उत्तर

1) Path of the rays after striking the water surface is shown below:

2) Ray 'B' and ray 'D' exhibit the phenomenon of reflection and total internal reflection (TIR), respectively.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2016-2017 (March) Set 1

संबंधित प्रश्‍न

Draw the diagram of a right-angled isosceles prism which is used to make an invented image erect.


Swarali has got the following observations while doing an experiment. Answer her questions with the help of observations.

Swarali observed that the light bent away from the normal, while travelling from dense medium to rarer medium. When Swarali increased the values of angle of incidence (i), the values of angle of refraction (r) went on increasing. But at a certain angle of incidence, the light rays returned into the dense medium.

So, Swarali has some questions. Answer them –
a) Name this certain value of ‘i ’. What is the value of ‘r’ at that time ?
b) Name this process of returning of light in dense medium. Explain the process.

 


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b) List the phenomena which are observe in this process.
c) Redraw the diagram and show above phenomena in it.


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(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
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(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.


Choose the correct option.

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Observe the given figure of the raindrop and answer the following questions:

  1. Label A and B of the given diagram. Why colour will deviate most.
  2. Name the phenomenon shown in label C.

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