AP EAMCET Engineering 2016 Code C Paper

In Young’s double slit experiment, red light of wavelength 6000Åis used and the nth bright fringe is obtained at a point ‘P’ on the screen. Keeping the same setting, the source of light is replaced by green light of wavelength 5000Å and now (n+1)th bright fringe is obtained at the point P on the screen. The value of ‘n’ is