In a YDSE experiment 2 540 nm D 1m d 1 mm A thin film is

Last updated: 6/12/2023

In a YDSE experiment 2 540 nm D 1m d 1 mm A thin film is pasted on upper slit and the central maxima shifts to the point just in front of the upper slit What is the path difference at the centre of the screen A 540 nm B 270 nm C 500 nm D 810 nm