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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 ….. - Science and Technology 1

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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

If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?


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


 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?


Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram: 

(a) Incident ray
(b) Point of incidence
(c) Normal
(d) Reflected ray
(e) Angle of incidence
(f) Angle of reflection


 Write all the capital letters of the alphabet which look the same in a plane mirror.


The image of an object formed by a plane mirror is:

(a) virtual
(b) real
(c) diminished
(d) upside-down


An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the positions of the original and final images seen in the mirror is ______.


A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is ______.


If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?


If a ray of light goes form a denser medium to a rarer medium, will it bend towards the normal or away from the normal?


State two effects caused by the refraction of light.


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


Fill in the following blank with suitable word: 

Light travelling along a normal is ...............refracted.


Fill in the following blank with suitable word:  

Light bends when is passes from water into air. We say that it is ............


What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light?


Light travels more quickly through water than through glass. 

 Which is optically denser : water or glass? 

 


When a light ray passes from air into glass, what happens to its speed? Draw a diagram to show which way the ray of light bends. 


 A coin in a glass tumbler appears to rise as the glass tumbler is slowly filled with water. Name the phenomenon responsible for this effect.


When a ray of light travelling in glass enters into water obliquely:

(a) it is refracted towards the normal
(b) it is not refracted at all
(c) it goes along the normal
(d) it is refracted away from the normal


A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:

(a) 0°
(b) 45°
(c) 90°
(d) 120°


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

 What is the angle of incidence?


Water is optically denser than glass.


Image is formed by a mirror due to refraction of light.


Water is optically .......... than air.


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


Draw a diagram showing the refraction of a light ray from water to glass. Label on it the incident ray, the angle of incidence (/), and the angle of refraction (r)


A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it. 


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.


Define the principal focus of a concave mirror.


The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.


Light changes its direction when going from one transparent medium to another transparent medium. This is called _______.


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


The refractive index of four substances A, B, C, and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in


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.


When light passes from one medium to another the ray gets bent. This property of light is called ______.


The bending of light as it passes from one medium to another is called ______.


The ratio of the sine of the angle of incidence to the sine of ______ is constant.


Why a pencil partly immersed in water appears to be bent at the water surface.


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


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