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Optics
Optics

Resolving Power of Grating

R=λΔλ=mNR = \frac{\lambda}{\Delta\lambda} = mN

The ability of a grating to distinguish between two closely spaced wavelengths.

Variables

R
Resolving power
unitless
\lambda
Wavelength
m
\Delta\lambda
Minimum resolvable wavelength difference
m
m
Order number
unitless
N
Number of slits
unitless

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Common questions

What is the Resolving Power of Grating formula?

Resolving Power of Grating is written R = λ/Δλ= mN. The ability of a grating to distinguish between two closely spaced wavelengths. It belongs to Optics, under Wave Optics.

What are the units in R = λ/Δλ= mN?

In SI units, R is resolving power (dimensionless); \lambda is wavelength, measured in m; \Delta\lambda is minimum resolvable wavelength difference, measured in m; m is order number (dimensionless); N is number of slits (dimensionless).