‘‘A concave mirror of focal length 15cm can form a magnified erect as well as inverted image of an object placed in front of it.’’ Justify this statement stating the position of the object with respect to the pole of the mirror in both cases for obtaining the images.
CBSE OUTSIDE DELHI - SET 3 2014
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The two cases can be there for the position of object with respect to the pole of the mirror:
When object is placed between pole and focus of concave mirror and the distance is less than 15cm, the image obtained will be a magnified, erect and virtual image.
When object is placed between focus and center of curvature, 15 to 30cm, the image obtained will be magnified, real and inverted.
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Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length ƒ, of the concave mirror.
Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.
When an object is placed at a distance of 15cm from a concave mirror, its image is formed at 10cm in front of the mirror. Calculate the focal length of the mirror.