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

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. - Science and Technology 1

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प्रश्न

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.

रिकाम्या जागा भरा
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उत्तर

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

Explanation:

  1. Light changes its direction when going from one transparent medium to another transparent medium. This is called the refraction of light.
  2. As every medium has a different refractive index, this causes the direction of light to change.
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पाठ 6: Refraction of light - Exercises [पृष्ठ ७९]

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बालभारती Science and Technology 1 [English] Standard 10 Maharashtra State Board
पाठ 6 Refraction of light
Exercises | Q 1.2 | पृष्ठ ७९

संबंधित प्रश्‍न

  Column I Column II Column III
1 Dispersion Long-sightedness Twinkling of stars
2 Refraction Splitting of white light into component colours Convex lens
3 Hypermetropia Change in the direction of the ray of light due to change in medium Spectrum of seven colours

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.


Where is the image when you look at something in a mirror?


A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?


Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance?


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? 


What is the difference between regular reflection of light and diffuse reflection of light? 


What type of reflection of light takes place from a cinema screen?


 An extended object in the form of an arrow pointing upward has been placed in front of a plane mirror. Draw a labelled ray-diagram to show the formation of its image.


State and explain the laws of reflection of light at a plane surface (like a plane mirror), With the help of a labelled ray-diagram. Mark the angles of 'incidence' and 'reflection' clearly on the diagram. If the angle of reflection is 47.5°, what will be the angle of incidence?


A man sits in an optician's chair looking into  plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be?

 


Explain how to read the following message which was found on some blotting paper:


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


What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.


A ray of light travelling in air is incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the completer path of this ray of light. Mark the two points where the refraction of light takes place. What can you say about the final direction of ray of light?


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. 

If a ray of light passes from glass into water, which way will it bend : towards the normal or away from the normal?


 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


The speed of light is more in glass than in water.


The depth of a pond when seen from above appears to be less.


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


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. 


Due to _______ pencil looks bent in water, in the given experiment.


Lights of different colours are used as signal for safety transport. From these, the wavelength of red light is _______ nm.


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


The speed of light varies in different media.


Why does a ray of light bend when it travels from one medium to another?


Explain with diagrams how refraction of incident light takes place from

  1. rarer to denser medium
  2. denser to rarer medium
  3. normal to the surface separating the two media.

Assertion and reasoning type

  1. Assertion: If the refractive index of the medium is high (denser medium) the velocity of the light in that medium will be small
  2. Reason: Refractive index of the medium is inversely proportional to the velocity of the light

What is refractive index?


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?


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


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


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


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.


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