A Young's Interference Experiment Is Conducted with Blue-Green Argon Laser

Multiple Choice

A Young's interference experiment is conducted with blue-green argon laser light (λ = 515 nm) .The separation between the slits is 0.50 mm,and the interference pattern appears on a screen 4.95 m away.What is the spacing between the bright fringes? (1 nm = 10−⁹ m)

A) 3.4 mm
B) 5.1 mm
C) 1.7 mm
D) 6.8 mm