25. It is desired to obtain an erect image of an object using a concave mirror of focal length
12cm.
(V++2)
i) What should the range of distance of an object be if it is placed in front of the mirror?
in) Will the image be smaller or larger than the object?
iii) Where will the image of this object be if it is placed 24cm in front of the mirror? Draw a
ray diagram for this situation to justify your answer. Show the positions of the pole, the
principal focus and the centre of curvature in the above ray diagrams. pls give right ans
Answers
Answer:
in a concave mirror an erect image will be obtained when the object is placed between pole and focus of the mirror. (i) Therefore, the range of object distance is between 0 cm to lt12 cm (from zero to less than 12 cm). (ii) Image formed will be magnified, i.e., large than the object.
Explanation:
In a concave mirror an erect image will be obtained when the object is placed between pole and focus of the mirror.
Focal length, f = 12 cm
(i) Therefore, the range of object distance is between 0 cm to lt12 cm (from zero to less than 12 cm).
(ii) Image formed will be magnified, i.e., large than the object.
(iii) If the object is placed at 24 cm in front of the mirror, it means that object is placed at 2f, i.e., at the centre of curvature (at C) of the mirror.
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