1. In order to observe interference through slits, the sources must be: a) white light b) coherent c) many wavelengths in scope d) in picometers

2. A laser is shone through a grating that has slits 1.0 x 10-6 meters apart. The result hits the wall 3 centimeters from the grating. The first order constructive interference is 2 centimeters from the central maximum. What is the wavelength of the laser?

3. A 400nm laser strikes a grating with 1.0 x 10-6 m slit separation. If the wall is 4 centimeters from the grating, how far is the first order from the central maximum, in centimeters?

4. You have a laser going through 2 slits 0.5 millimeters apart. Once it goes through the slit, it hits a screen 3.3 meters away. The first bright fringe is located 3.4 millimeters away from the central maximum. What is the wavelength of the laser?

5. A laser beam has a wavelength of 400 nm. What is the color of the beam?