Posted by John on .
Which of the following equations describes the condition for observing the fourth bright fringe in Young's doubleslit interference pattern? Assume n = 0 for the central bright fringe.
d sinθ = λ
d sinθ = 3λ/2
d sinθ = 3λ
d sinθ = 4λ

Physics 
Elena,
d•sinθ=2k•λ/2=k λ
k=4
d sinθ = 4λ