11.6 CHAPTER 11. 2D AND3D WAVEFRONTS
Chapter 11 End of Chapter Exercises
- In the diagram belowthe peaks of wavefronts are shown by black lines
and the troughs by greylines. Mark all the points where constructive
interference between two waves is taking place and where destructive
interference is taking place. Also note whether the interference results
in a peak or a trough.
A B
C
� ��- For a slit of width 1300 nm, calculate the first 3 minima for light of
the following wavelengths:
(a) blue at 475 nm
(b) green at 510 nm
(c) yellow at 570 nm
(d) red at 650 nm - For light of wavelength 540 nm, determine what the width of the slit
needs to be to have thefirst minimum at:
(a) 7.76 degrees
(b) 12.47 degrees
(c) 21.1 degrees - For light of wavelength 635 nm, determine what the width of the slit
needs to be to have thesecond minimum at: