In a Young's double slits experiments. The interference patterns are shown on the screen.
1.) What is path difference between he ray form the one slit to the forth order od destructive fringe and the ray fom the other slit to the destructie fringe?
2.) Show the path difference in your drawing of ray disgram. ? = red laser light. L= 20 cm from the oduble slits to a screen. The separation of the double slits is 3mm.
3.) Find the angle of the order of the destructive fringe.