Question

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Answer 1

Here is your answer dear

1. If the image of the child looking her head bigger and hence, the mirror must be used a concave mirror. ... Her middle portion of body is not changed or unaltered and hence, the middle part of the mirror must be used as a plane mirror.
2. In torches, search lights and headlights of vehicles, the bulb is placed very near to the focus of the reflector (or concave mirror).
3. It is given that sun rays converge at 15 cm. So, focal length of the mirror = f = 15 cm. In case of a concave mirror, the size of image and object will be same if the object is placed at 2f.
4. Between the pole of the mirror and its principal focus.
5. The student should use a convex lens as a convex lens produces a real image of the candle flame on the wall. Convex lens converges the rays and helps in obtaining the rel image of an obeject.

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Answer 2

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