concave mirror

Apr 3rd, 2015
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It is about mirrors and their reflection

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When the object at infinity, the image formed is real, inverted and highly diminished. The image formed is at the focus (F), real and inverted and much smaller than the object. When the object is at infinity, the image is formed at the focus of concave mirror.When the object is placed beyond centre of curvature the image formed is 1) between the focus and centre of curvature, 2) real and inverted 3) smaller than the object (diminished).When the object is placed at centre of curvature the image formed is 1) at the centre of curvature 2) real and inverted 3) same size as the object.When the object is placed between focus and centre of curvature the image formed is 1) beyond the centre of curvature 2) real and inverted 3) larger than the object (magnified).When the object is placed at the focus the image formed is 1) at infinity 2) real and inverted 3) highly magnified.When the object is placed between pole and focus the image formed is 1) behind the mirror 2) virtual and erect 3) larger than the object (magnified)The principal focus of a concave mirror is a point on its principal axis to which all the light rays that are parallel and close to the axis converge after reflection. The focus of a concave mirror is in front of the mirror. For e.g. an image of the sun can be produced by a concave mirror at its focus. Take a concave mirror and point it towards the sun. Hold a piece of paper in front of the concave mirror in such a way that the sunlight reflected by the mirror

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