In this modern-day recreation of Thomas Young’s Double Slit Interference experiment, you will use a red, green, or blue laser and two slits in a metal plate to create a classical double-slit interference pattern on a screen. By adjusting the screen distance and the slit spacing and measuring the distance between maxima in the interference pattern, you will determine the wavelengths of the red, green, and blue lasers.
Warning — This one is extremely difficult, so measure as carefully as you can!
Good luck!