मराठी
सी.आई.एस.सी.ई.आयसीएसई 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.

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

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सेलिना Concise Physics [English] Class 8 ICSE
पाठ 5 Light Energy
Short/long Answer Question | Q 34 | पृष्ठ १०१

संबंधित प्रश्‍न

Draw a ray diagram for concave mirror when the object is between centre of curvature and focus.


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(b) Find the linear magnification of the image produced.

(c) How far is the image from its object?

(d) Draw ray diagram to show the image formation in this case.


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Draw a ray diagram showing how a concave mirror can be used to produce a real, inverted and diminished image of an object.


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

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Draw a ray diagram to show the formation of image of an object placed on the principal axis of a convex mirror. State the position, size and nature of the image. What happens to the image as the object is moved away from the mirror?


A student obtained a sharp image of the grills of a window on a screen using a concave mirror. His teacher remarked that for getting better results a well lit distant object (preferably the sun) should be focussed on the screen. What should be done for this purpose?

(A) Move the screen slightly away from the mirror

(B) Move the mirror slightly towards the screen

(C) Move the screen and the mirror away from the object

(D) Move the screen and the mirror towards the 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.


An image formed by a lens is erect. Such an image could be formed by a


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