A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source. A fringe pattern is observed on a screen 4.8 m from the slits. If there are 5.0 bright fringes/cm on the screen, what is the wavelength of the monochromatic light?
A) 550 nm B) 600 nm C) 650 nm D) 700 nm E) 750 nm
apply Y = mLR/d
d = 1.8 mm
so wavelgnth L = Yd/mR
L = (1*10^-2 * 1.8 mm/(5 * 4.8)
L = 750 nm
A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent...