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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

The diagram given below in fig shows a ray of light AO falling on a surface separating two media. Draw the refracted ray in each, case. - Physics

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प्रश्न

The diagram given below in fig shows a ray of light AO falling on a surface separating two media. Draw the refracted ray in each, case.

थोडक्यात उत्तर

उत्तर

Refracted ray 0 C is shown in each case.

Towards the normal or ∠r < ∠i

Away from the normal or ∠r > ∠i

Refracted ray goes undeviated

or 

∠i = 0

∠r = 0

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पाठ 5: Light Energy - Short/long Answer Question [पृष्ठ १००]

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सेलिना Concise Physics [English] Class 8 ICSE
पाठ 5 Light Energy
Short/long Answer Question | Q 12 | पृष्ठ १००

संबंधित प्रश्‍न

Explain with a suitable diagram, how a concave mirror converges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.

 


Fill in the following blank with a suitable word:
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from ............ after reflection from the mirror.


Where would the image be formed by a convex mirror if the object is placed: 

 between infinity and pole of the mirror? 

Draw labelled ray-diagrams to show the formation of image in both the case. 


Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses. 


 Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram. 


A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards:

(a) Convex, Plane, Concave
(b) Plane, Convex, Concave
(c) Concave, Plane, Convex
(d) Convex, Concave, Plane


The radius of curvature of a convex mirror used as a rear view mirror in a moving car is 12.0 m. A truck is coming from behind it at a distance of 3.54 m. Calculate (a)

  1. position and
  2. size of the image relative to the size of the truck.
  3. What will be the nature of the image?

Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed: 

at 2F1


A convex mirror is used


Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.

Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.


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