Chapter 38 Serway & Beichner 6 th Ed.

Fig 38-4a, p.1207 Diffraction

D = a P wave front

Phasor Model Where we assume:

Note: β =  and E R = E θ

These produces the same interference patterns!

a b

Diffraction from Circular Aperture

Single SlitDouble Slit Diffraction and Interference ad

y/y o x =.633  m a = 5.0  m a = 2.5  m

Diffraction also depends on wavelength! a = 2.5  m x y/y o

Missing Peaks!! Diffraction Modifies the Interference Pattern!!

Primary

Fig 38-29, p.1226 Polarization: Defined as the direction of E-field! Linear, Circular, Elliptical

Fig 38-28, p.1225

Circular Polarization

Elliptical Polarization

Polarizers

Fig 38-32, p.1228

Fig 38-33, p.1229

Fig 38-34, p.1229