What is dispersive power of diffraction grating?
Dispersive power of plane diffraction grating: The dispersive power of a diffraction grating is defined as: The rate of change of the angle of diffraction with the change in the wavelength of light are called dispersive power of plane grating.
What is the formula for the dispersive power of grating?
In equation (ii) dθ/dλ is the dispersive power, n is the order of the spectrum, N’ is the number of lines per cm of the grating surface and θ is the angle of diffraction for the n th order principal maximum of wavelength λ.
On which factors dispersive power of grating depends?
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.
What is dispersive power and write its expression?
Solution : It is the power of transparent medium to separate colours of light by refraction. It is measured by the difference in refractivity for two specified widely differing wavelengths (say red & violet) divided by the refractivity at some specified intermediate wavelength (say yellow.) <
What is the dispersive power?
Definition of dispersive power : the power of a transparent medium to separate different colors of light by refraction as measured by the difference in refractivity for two specified widely differing wavelengths divided by the refractivity at some specified intermediate wavelength.
How does dispersive power depends on the refractive index?
We know that, the refractive index of the material of a prism is given by, n=sin(A+D2)sin(A2) where, A is the angle of prism and D is the angle of minimum deviation. So, we can see that the dispersive power solely depends on the refractive index of the material of the prism. So, option (B) is the correct option.
What is dispersive power of a glass prism?
Dispersive power of prism is defined as the measure of the difference in refraction of the light of the highest wavelength and the lowest wavelength that enters the prism. The dispersive power of the prism can also be expressed in terms of the angle between the two extreme wavelengths.
What is dispersive power of a lens?
: the power of a transparent medium to separate different colors of light by refraction as measured by the difference in refractivity for two specified widely differing wavelengths divided by the refractivity at some specified intermediate wavelength.
What is a dispersive power?
What is the relation between the dispersive power of a grating and the grating element B D?
What is the relation between the dispersive power, D, of a grating and the order, n, of a spectrum? Thus, as we can see D ∝ n. Hence, higher the order, higher is the dispersive power.
How is dispersive power related to wavelength?
Answer: Dispersive power of prism is defined as the measure of the difference in refraction of the light of the highest wavelength and the lowest wavelength that enters the prism. The dispersive power of the prism can also be expressed in terms of the angle between the two extreme wavelengths.
How does the dispersive power of glass?
Mean refractive index means the average of two or more refractive indices. The dispersive power for glass is $0.01639$ .
How do you calculate dispersive power of glass?
Calculate dispersive power of glass, accurately up to decimal places, from the following data: Refractive index of glass for red colour = 1.60. Refractive index of glass for yellow colour =1.61. Refractive index of glass for violet colour = 1.62.
What is dispersive power of an optical medium?
Dispersive power of a medium is defined as the ratio of angular dispersion of white light created by that medium to the mean deviation of light. Given : nv=1.