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

We can see the sun even when it is little below the horizon because of ______.

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प्रश्न

We can see the sun even when it is little below the horizon because of ______.

पर्याय

  •  Reflection of light

  • Refraction of light

  • Dispersion of light

  • Absorption of light

MCQ
रिकाम्या जागा भरा
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उत्तर

We can see the Sun even when it is little below the horizon because of refraction of light.

Explanation:

We can see the Sun even when it is a little below the horizon because of atmospheric refraction. The Earth’s atmosphere bends the light from the Sun upwards towards the eye of the observer. Even though the Sun itself might be just below the horizon line, the light is refracted or bent by the atmosphere, thus making the Sun appear to be visible.

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पाठ 6: Refraction of light - Exercise [पृष्ठ ७९]

संबंधित प्रश्‍न

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 is lateral inversion? Explain by giving a suitable example.


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 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?


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 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 ______.


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


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?


Fill in the following blank with suitable word: 

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


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?


Light travels more quickly through water than through glass.

  1. Which is optically denser: water or glass?
  2. If a ray of light passes from glass into water, which way will it bend: towards the normal or away from the normal?

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?


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.


State two factors on which the lateral displacement of the emergent ray depends.


Light travelling from a denser medium to a rarer medium along a normal to the boundary:

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


How does the light have to enter the glass: 

 for no refraction to happen? 


A ray of light when passes from glass to air, bends towards the normal.


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


Match the Following

Column A Column B 
(a) white Light  (1) Convex mirror
(b) Refraction (2) Concave mirror
(c) Virtual images  (3) refraction
(d) Real images  (4)  spectrum
(e) Prism (5) ray of light from glass to air 

What do you understand by refraction of light?


Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror


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 speed of light varies in different media.


Write scientific reason.

The sun appears on the western horizon for some time after sunset.


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


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?


The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.


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?


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.


Which surface will not reflect most of the light falling on them?


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


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


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


When a ray of light travels normal to the given surface, then the angle of refraction is ______.


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