KCET 2018 Physics Solved Paper

Question : 23 of 60

Marks: +1, -0

In Young's double slit experiment , two wavelengths λ1 = 780 nm and λ2 = 520 nm are used to obtain interferance fringes. If the nth bright band due to λ1 concides with (n+1)th bright band due to λ2 then the value of n is