The following describes the YDSE set-up:
- $$ \beta = \lambda*D/d $$ $$ where: \beta = Fringe..Width $$ $$ \lambda = Wavelength..of..light $$ $$ D= Distance..between.. the.. slits.. and.. the.. screen $$ $$ d= Distance.. between.. the.. two.. sources $$
This formula does not give any relation between the aperture of the primary source of light and the interference pattern.
My question is two part:
- Does changing the size of aperture effect the interference pattern?
- Is there a formula that describes the relation between the aperture and the interference pattern?
I tried to find answer on wikipedia and Fundamentals of Physics by David Halliday, Robert Resnick, and Jearl Walker but couldn't find any.
I personally feel that it should not effect the interference pattern but I am not sure.
Thank you in advance