Useful links

Useful resources:


http://www.physics.buffalo.edu/phy207/lc/lc15.pdf

http://hyperphysics.phy-astr.gsu.edu/hbase/waves/wavsol.html#c1



Identities to know:

     cos(x+λ) = cos(x)     and   λ = 2π
cos(x + λ/2) = -cos(x)   and   λ/2 = π
cos(x + λ/4) = -sin(x)   and   λ/4 = π/2


LOCATIONS OF THE WAVE ANGLE MAXIMA AND MINIMA
ΔL = dsin(θ)

MAXIMA:
ΔL = nλ

MINIMA:
ΔL = (n + 1/2)λ