Abstract
Diffraction gratings are used in many fields in physics, especially effectively used in astronomical applications. There are many equations that govern the physics of these gratings, including the resolving power equation and dispersive power equation. In order to introduce the concept of dispersive power of the grating, most of the physics undergraduate courses contain this experiment in the laboratory courses. This paper discusses an all-together new approach to determine the dispersive power of the grating using lasers.. Key Words: Diffraction grating, Dispersive power, Under-graduate experiment, semiconductor Lasers.
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