Question

On what factors does the dispersive power of a grating depend

Answer 1

The dispersive power of a grating depends on the factors of refractive index of the prism and independent on the shape and size of the prism

Answer 2

Answer:

The dispersive power of grating depends on the refractive index of the prism and is independent of the shape and size of the prism.

Explanation:

Dispersive power of a grating is defined as the ratio of the difference in the angle of diffraction of any two neighbouring spectral lines to the difference in the wavelength between the two spectral lines.

It can also be defined as the diffraction in the angle of diffraction per unit change in wavelength