Transcription of Chapter 3 7 Inter ference of Light W aves
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Chapter 3 7 Inter ference of Light W aves
Chapter 37 interference of Light WavesCHAPTER for s Distribution of theDouble-Slit Addition of of Phase Due in Thin Michelson Interferometer1176!The colors in many of a hummingbird s feathers are not due to pigment. The iridescencethat makes the brilliant colors that often appear on the throat and belly is due to aninterference effect caused by structures in the feathers. The colors will vary with the viewingangle. (RO-MA/Index Stock Imagery)1177In the preceding Chapter , we used Light rays to examine what happens when lightpasses through a lens or reflects from a mirror. This discussion completed our study ofgeometric optics. Here in Chapter 37 and in the next Chapter , we are concerned withwave opticsor physical optics,the study of interference , diffraction, and polarization oflight. These phenomena cannot be adequately explained with the ray optics used inChapters 35 and 36.
3 7.1 Conditions for Interference In Chapter 18, we found that the superposition of two mechanical waves can be constructive or destructive. In constructive inter ference, the amplitude of the resultant wave at a given position or time …
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