How important the chapter Ray optics and optical instruments is? Why do we study the chapter Ray optics and optical instruments? How many marks are carried by the chapter Ray optics and optical instruments in class 12 board examinations? How you will explain the reflection of light through spherical mirror? What do mean by magnification of a mirror?
Ray optics and optical instruments (part-2)
By Jagran Josh
May 22, 2013, 15:30 IST
The capability of a lens or mirror converge or diverge light is called as focal length. For an optical instrument in air, it is the distance over which initially collimated rays are brought to a focus.
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