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The short theory

Phenomenon of interference is the imposing coherent waves and distribution the light stream in the space with a weak and amplified intensity of light. Amplitude of result oscillation is

, (9.1)

where A₁, A₂ - amplitudes; , - elementary phases of imposed oscillations. The intensity of light is proportional to squared of amplitude ,

then , (9.2)

if > 0 , I > I₁ + I₂: max,

< 0 , I < I₁ + I₂: min.

Coherent waves are waves with the same frequency and with the constant phase difference in the time.

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