Optics the angular dispersion of......

the angular dispersion is defined as the rate of change of the angle of the dispersed light, , with wavelength, λ. We can obtain an expression for the angular dispersion by differe...

here is the solution for dispersive power

Dispersive power of grating :- The dispersive power of a grating is defined is the ratio of difference in angle of diffraction of any two neighbour spectral lines to the difference...

see attached file it's very helpful for you

for diffraction gratting n(lembda) = 2dsinx. here the solution is for the same wavelength.

see the attached: