University Physics Volume 3

Key Equations

Key Equations

 Destructive interference for a single slit $asinθ=mλform=±1,±2,±3,...asinθ=mλform=±1,±2,±3,...$ Half phase angle $β=ϕ2=πasinθλβ=ϕ2=πasinθλ$ Field amplitude in the diffraction pattern $E=NΔE0sinββE=NΔE0sinββ$ Intensity in the diffraction pattern $I=I0(sinββ)2I=I0(sinββ)2$ Rayleigh criterion for circular apertures $θ=1.22λDθ=1.22λD$ Bragg equation $mλ=2dsinθ,m=1,2,3...mλ=2dsinθ,m=1,2,3...$