Chapter 9. Light as a Wave. 24.1 Interference. Light waves interfere with each other much like mechanical waves do All interference associated with light waves arises when the electromagnetic fields that constitute the individual waves combine LINEAR SUPERPOSITION!.
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Light as a Wave
θ is small and therefore the approximation tan θsin θ can be used
180 phase change
Destructive interference when: 2t=λ/(2n1)
Minimum thickness for nonreflecting surfaces: t=λ/(4n1)
y=Ltanq=(2.75 m)(tan0.95)=0.046 m