Summary: The Double Slit Experiment 22. Now observe the effect of two slits using water waves, sound waves, or light waves. Two slits are used to create two new waves with the same amplitude, period, and frequency. This helps scientists observe how two such waves will interfere. Scientists have used two slits to prove that light acts as waves; diffracting and creating areas of interference just like water or sound. Add a total of two (2) slits. Set the frequency to blue light. Engage 'Screen'. Engage 'lntensity'. Engage 'Max Amplitude'. | u in." Set slit width to 320 nm. Set slit separation to 550 nm. Double Slit Experiment 'Blue Light' Screenshot Paste your screenshot here