The path length difference between two waves coming from coherent sources for destructive interference should be

The path difference between two waves is

Interference is an important property of light. In the given table, Column I shows the properties of interfering waves, Column II shows the phase difference, and Column III shows the path difference between two interfering waves What are the conditions for destructive interference?

What is the path difference of destructive interference

In experimental set up of interference the twol interfering sources S_(1) and S_(2) have an initial phase difference corresponding to a path difference of lambda//4 . The phase difference due to path difference between the twoll interfering waves at a point of constructive and destructive interference respectively is

Write the relationship between the path difference and the wavelength of light used for constructive and destructive interference of light.

Which of the following is the path difference for destructive interference ?