Prism angular dispersion

A is at the position of the first minimum of the pattern of A2. In this case, the Rayleigh criterion is satisfied (Fig. 3.1-5). The different angles are a consequence of the angular dispersion d

dispersive elements the gratings or prisms. 

For a prism spectrometer with a symmetrically arranged prism with the refractive index n at an angle 7 (Fig, 3.1-9), the angular dispersion is given by... 

Angstrom, A A unit of length equal to 1 X 10 meter. Angular dispersion, dr/dA A measure of the change in the angle of reflection or refraction of radiation by a prism or grating as a function of wavelength. 

The expression for the angular dispersion of a prism as the wavelength changes therefore is... 

This shows that the angular dispersion increases with the prism angle 6, but does not depend on the size of the prism. 

The attainable spectral resolving power of a spectrometer is determined by its angular dispersion. When passing the dispersing element (prism or grating), a parallel beam composed of two monochromatic waves with wave-... 

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