Two slits, 0.5 mm apart, are placed at a distance of 1.5 meters from a screen.  Light of 300 nm illuminates the two slits and an interference pattern is observed on the screen.  What is the distance between the central bright spot and the first bright spot on either side

In a double-slit experiment, the slit separation is 2.0 mm, two wavelengths of 910 nm and 650 nm illuminate the slits, the screen is placed 2.8 meters away from the slits. At what distance from the central maximum on the screen will a dark fringe from one pattern first coincide with a dark fringe from the other?

Light of a single wavelength shines through a double slit, then onto a screen that is 6.5 m away from the slits. The slits are 0.21 mm apart. There is an interference pattern on the screen with dark bands measured to be 1.6 cm apart. Find the wavelength of the light.

A laser light source with wavelength λ = 545 nm is incident on a diffraction grating (as in the figure). The grating has 495 slits per mm. An observation screen is a distance L = 0.35 m from the grating. What is the separation between individual slits in the grating? Be careful with units: 1 nm = 10-9 m, 1 mm = 10-3 m, and 1 cm = 10-2 m. d = nm What is the distance y along the screen where the first-order diffraction peak is observed? y= cm source grating m=1