The resolving power (RP) of a diffraction grating with N slits in the m-th order is:
A$RP = mN$
B$RP = m + N$ (sum)
C$RP = m / N$ (ratio)
D$RP = m^2 + N^2$
Answer & Solution
Correct answer: A. $RP = mN$
Diffraction grating: RP = λ / Δλ = mN (where N = number of slits illuminated, m = diffraction order). Higher orders + more slits = sharper, better-separated spectral lines.
Related questions
Blue sky seen through a rotating polaroid rises and falls in brightness. Sky light is:Two polaroids are set crossed. The light passing through both is:Ordinary lamp light passes through one polaroid. Its intensity drops to:Wiggle a string up and down and a wave runs along it. The displacement is at right angles The rainbow of colours you see on a CD comes from:Diffraction is shown by:Near the edge of a shadow you see alternate dark and bright bands. This is:In Young's pattern, consecutive bright fringes are: