JEE Main 20209 Jan, Evening shiftPhysicsMediumOptics190× since 2002
In a Young's double slit experiment 15 fringes
are observed on a small portion of the screen
when light of wavelength 500 nm is used. Ten
fringes are observed on the same section of
the screen when another light source of
wavelength is used. Then the value of is
(in nm) __________.