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An object of size 7.0 cm is placed at 27...

An object of size `7.0 cm` is placed at `27 cm` in front of a concave mirror of focal length `18 cm`. At what distance from the mirror, should a screen be placed, so that a sharp focussed image can be obtained ? Find the size and nature of the image ?

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MBD -HARYANA BOARD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
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  13. APERTURE

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  14. Define the principal focus of a lens.

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  15. Define the focal length of a spherical mirror.

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  18. Which mirror is used as a shaving mirror and why ?

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  20. Which mirror has a wider field of view ?

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