1.

In a spectrometer, what is the function of:• Collimator ?• Telescope ?

Answer»

(1) Collimator’s function is to alter the distance between the slit and the lens by rack and pinion arrangement. The slit is adjusted to be at the focus of the collimating lens so as to get a parallel beam of light.

(2) Telescope function is to adjust the distance between lens and the cross-wires by rack and pinion arrangement, while that between cross-wires and eye piece by hand. The objective of the telescope forms a real image of the slit. This image is then magnified by the eyepiece.



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