Question asked by Filo student

$\begin{array}{lll}\text{ (i) }10\mathrm{cm}& \text{ (ii) }15\mathrm{cm}& \text{ (iii) }20\mathrm{cm}\end{array}$ Give reasons for your choice. 39. A concave mirror has a focal length of $25\mathrm{cm}$. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror? (a) $45\mathrm{cm}$ (b) $20\mathrm{cm}$ (c) $25\mathrm{cm}$ $(d)30\mathrm{cm}$ Give reason for your choice. 40. An object is placed at the following distances from a concave mirror of focal length $15\mathrm{cm}$, turn by tum : (a) $35\mathrm{cm}$ (b) $30\mathrm{cm}$ (c) $20\mathrm{cm}$ (d) $10\mathrm{cm}$ Which position of the object will produce :

1. a magnified real image?
2. a magnified virtual image?
3. a diminished real image ?
4. an image of same size as the object?

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Updated on: Mar 2, 2023