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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Complete the following diagrams in figure by drawing the reflected rays for the incident rays 1 and 2 if F is the focus and C is the centre of curvature.

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प्रश्न

Complete the following diagrams in figure by drawing the reflected rays for the incident rays 1 and 2 if F is the focus and C is the centre of curvature.

आकृति
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उत्तर

1. Ray passing through F after reflection becomes parallel to the principal axis.
Ray (2) passing through the centre of curvature travels back (retraces its path) i.e. reflected back along its own path.

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अध्याय 5: Light Energy - Short/long Answer Question [पृष्ठ १०१]

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एस.एस. शोम Concise Physics [English] Class 8 ICSE
अध्याय 5 Light Energy
Short/long Answer Question | Q 34 | पृष्ठ १०१

संबंधित प्रश्न

To construct ray diagrams, two rays of light are generally so chosen that it is easy to determine their directions after reflection from a mirror. Choose two such rays and state the path/direction of these rays after reflection from a concave mirror. Use these two rays to find the position and nature of the image of an object placed at a distance of 8 cm from a concave mirror of focal length 12 cm.


A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be ______.


To construct a ray diagram we use two rays which are so chosen that it is easy to know their directions after reflection from the mirror. List two such rays and state the path of these rays after reflection in case of concave mirrors. Use these two rays and draw ray diagram to locate the image of an object placed between pole and focus of a concave mirror.


If the focal length of a convex mirror is 25 cm, what is its radius of curvature?


Make labelled  ray diagrams to illustrate the formation of: 

 a virtual image by a converging mirror.
Mark clearly the pole, focus, centre of curvature and position of object in each case.


According to the "New Cartesian Singh Convention" for mirrors, what sign has been given to the focal length of: 

 a convex mirror? 


A converging mirror forms a real image of height 4 cm of an object of height 1 cm placed 20 cm away from the mirror:

  1. Calculate the image distance.
  2. What is the focal length of the mirror?

Name the mirror which can give: 

 an erect and enlarged image of an object.


To construct ray diagram we use two light rays which are so chosen that it is easy to know their directions after reflection from the mirror. List these two rays and state the path of these rays after reflection. Use these rays to locate the image of an object placed between centre of curvature and focus of a concave mirror.


A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at ______.


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