PHYSICS 1C Lecture 5: [Wk5.Tues] Interference

Distinguish between constructive interference and destructive interference?

1) How are interference experiments evidence for the wave theory oflight?
2) Is coherence important in interference? In diffraction? Inrefraction? In reflection? 3) In what way are interference anddiffraction similar? Different?

Please exlain all answers in detail and prove sketches.

Use your selected scale to produce interference between thefollowing waves:
a) Y=4sin8t and Y=3cos4t
b) Y=10sin9t and Y=6cos3t

Present resultant interference and indicate, on the graph, theareas of destructive interference and constructiveinterference.
Show the position on the wave where t= 2sec