CBSE Class 10 Science 2017 · Paper 31/1/1/C · Question 2

Any two of the following; the first two rest on different properties of the mirror. (i) As reflectors in torches, search-lights and vehicle headlights: a bulb placed at the focus gives a powerful parallel beam of light. (ii) As shaving mirrors: the face, held between the pole and the focus, is seen as an enlarged, erect image. Other uses: dentists' mirrors, to see large images of the teeth; and large concave mirrors in solar furnaces, to concentrate sunlight and produce heat.