Benzyl chloride. Benzyl chloride, or Î±-chlorotoluene, is an organic compound with the formula C6H5CH2Cl. This colourless liquid is a reactive organochlorine compound that is a widely used chemical building block.
Two slits are illuminated with red light (Î» = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central.
The distances from the two slits to the screen differ by an integer number of wavelengths + wavelength. Crest meets trough. If the interference pattern is viewed on a screen a distance L from the slits, then the wavelength can be found from the spacing of the fringes.