PrepZii

formula

Interference Intensity

The source gives resultant intensity for two waves and the incoherent-source result.

I=I_1+I_2+2\sqrt{I_1I_2}\cos(\Delta\phi)

Incoherent sources

I=I_1+I_2

$I$

current or intensity depending on context

$\phi$

magnetic flux or phase angle depending on context