With the help of a ray diagram, determine the position, nature and size of the image formed of an object placed at the centre of curvature of a concave mirror.
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When an object is placed at the centre of curvature (C) of a concave mirror, the image formed is:
At the centre of curvature (C).
Real and inverted.
Of same size as the object.
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“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw labeled ray diagram to justify this statement.
Draw a ray diagram to show the formation of a virtual magnified image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly.
In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of $55^{\circ}$ with the normal on one face of the slab, after refraction strikes the opposite face of the slab before emerging out into air making an angle of $40^{\circ}$ with the normal. Draw a labelled diagram to show the path of this ray.' What value would you assign to the angle of refraction and angle of emergence?