21. (a) We use the Rayleigh criteria. Thus, the angular separation (in radians) of the sources must be at least θR= 1.22λ/d, where λis the wavelength and dis the diameter of the aperture. For the headlights of this problem, ( )94R31.22 550 10 m1.34 10 rad,5.0 10 m−−−×==××or 41.3 10 rad−×, in two significant figures. (b) If
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.