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15 cards from this deck
Optical device splitting light into component wavelengths
Thousands of equally spaced parallel slits
ddd = distance between centres of adjacent slits
d=1lines per mm×10−3d = \frac{1}{\text{lines per mm}} \times 10^{-3}d=lines per mm1×10−3 m
Greater diffraction angles
Single wavelength light
Zero order, n=0n = 0n=0
nλ=dsinθn\lambda = d \sin \thetanλ=dsinθ
Order of diffraction (0, ±1, ±2, ±3...)
Wavelength of light (in metres)
Angle of diffraction from straight-through position
nnn wavelengths
nmax=dλn_{max} = \frac{d}{\lambda}nmax=λd
sinθ\sin \thetasinθ cannot exceed 1
Central spot (n=0n = 0n=0)
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