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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Choose and Write the Correct Option.If We Gradually Increase the Angle of Incidence of a Ray of Light Passing Through Prism Then …..

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प्रश्न

Choose and write the correct option.

If we gradually increase the angle of incidence of a ray of light passing through prism then …..

पर्याय

  •  Angle of deviation goes on decreasing.

  •  Angle of deviation decreases but after certain value of incident angle, deviation angle increases

  • Angle of deviation goes on increasing.

  • Angle of deviation increases but after certain value of incident angle deviation angle decreases.

MCQ
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उत्तर

 Angle of deviation decreases but after certain value of
incident angle, deviation angle increases.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2018-2019 (March) Balbharati Model Question Paper Set 3

संबंधित प्रश्‍न

What is refraction of light?


State whether the following statement is true of false:
A student says that we can see an object because light from our eyes is reflected back by the object.


What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?


A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light? 


 A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth?


The image formed by a plane mirror is :

(a) virtual, behind the mirror and enlarged.
(b) virtual, behind the mirror and of the same size as the object.
(c) real, at the surface of the mirror and enlarged.
(d) real, behind the mirror and of the same size as the object.


When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?


As light rays pass from water into glass, are they refracted towards the normal or away from the normal?


In which material do you think light rays travel faster-glass or air?


What is meant by the ‘angle of incidence’ for a ray of light?


A vertical ray of light strikes the horizontal surface of some water: 

What is the angle of refraction? 


How does the light have to enter the glass: 

 for no refraction to happen? 


Air is optically .......... than glass.


When a ray of light travels from water to air, it bends ............. the normal.


When a ray of light travels from air to glass, it bends .......... the normal.


A ray of light A incident from air suffers partial reflection and refraction at the boundary of water. 

  1. Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
  2. How are the angles of incidence i and refraction r related?

Fill in the blank and Explain the completed sentences.

The change in ______ of light rays while going from one medium to another is called refraction.


List in proper sequence the steps of the experiment for determining the approximate focal length of a given concave mirror by obtaining the image of a distant object.


The laws of reflection hold true for ______.


Observe the given figure and write appropriate phenomenon of light in the box.


Explain the working of a periscope.


The refractive index of a transparent medium is always greater than ______.


You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?


If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct?


In the above diagram light is travelling through different media. It is noted by a scientist that ∠1= ∠3 = ∠4 but ∠2 < ∠1. Which of the following statement would be correct?


A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. Support your answer with reason.


Light bends as it passes from one medium to another. What is this phenomenon called?


Light travels fastest in a vacuum. Why?


A star appears twinkling into the sky because of the reflection of light by the atmosphere.


Twinkling of stars and Mirage are the two phenomena occurring due to refraction.


Under what circumstances there won’t be any refraction of light when it enters from one medium to another?


How do twinkling stars occur? (or) what is the cause of the twinkling of stars?


Match the following:

  Column I   Column II
1. r > 90 a. Light gazes at the surface of separation between the two modes.
2. r = 90 b. No refraction.
3. r < 90 c. Refracted ray away from the normal

The bottom of swimming pool appears to be less deep than the actual one because of


In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are ______.


A ray of light starting from diamond is incident on the interface separating diamond and water. Draw a labelled ray diagram to show. the refraction of light in this case.


The change in the direction of the path of light when it passes from one transparent medium to another transparent medium is called:


According to the first law of refraction, the incident ray, the refracted ray, and the normal at the point of incidence:


The absolute refractive index of a medium is given by:


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