Question #794d3

1 Answer
May 22, 2017

#"Please watch the animation carefully."#

Explanation:

enter image source here

  • The O1 and O2 lights shown below represent the sources in the same phase.
  • Sources in the same phase produce waves at the same time.
  • The path difference between the two waves is zero.(g-h=0)
  • This fact does not change when you change the wavelength.

enter image source here