Question

Which of the following is not an essential condition for interference?

• A. The two interfering waves must propagate in almost the same direction
• B. The waves must have the same period and wavelength
• C. The amplitudes of the two waves must be equal
• D. The two interfering beams of light must originate from the same source

Answer 1

The correct option is A The two interfering waves must propagate in almost the same direction

When two waves are propagate in same direction