1. Fig. 37-5 Photograph of interference fringes produced on a screen in Young’s double slit experiment.

2. Fig. 37-6 Two radio antennas broadcasting in phase. Red arrows indicate directions of maximum intensity.

3. Fig. 37-7 Phasor diagram for the superposition (addition) at a point of two waves of equal amplitude E with a phase difference of . The resultant wave has amplitude of E p.

4. Fig. 37-8 Intensity distribution in the interference pattern from two identical slits. The maxima occur at points where  is an integral multiple of 2  and the path difference d = sin  is an integral multiple of.

5. Fig. 37-10 Interference between rays reflected from the upper and lower surfaces of a thin film. Constructive and destructive interference occur at different points along the film.

6. Fig. 37-11 Interference between two light waves reflected from the two sides of an air wedge separating two glass plates. The path difference is 2 t.