Chapter-10|Wave Optics|NCERT 12th Physics:
Interference of Light Wave:
Interference of light is the phenomenon of redistribution of light energy in a medium on account of superposition of light waves from two coherent sources.
Constructive Interference:
At the points where the resultant intensity of light is maximum, interference is said to be constructive.
Destructive Interference:
At the points where the resultant intensity of light is minimum, the interference it said to be destructive.
Theory of Interference of Waves:
Let the waves from two coherent sources of light be
y₁= a sinωt and y₂= b sin(ωt+Ø ) – (I)
Where, a and b are the respective amplitudes of the two waves and Ø is the constant phase angle by which second wave leads the first wave.
According to superposition principle
Intensity:
