Victoria Newbury & Katherine Jones1.29.14Physics 132 Lab W 2:30-4:30, room 212In lab DataNotes at beginning at class:- C=- = wavelength (often in nm)- diffractiono when light hits a “wall” and the waves go around it in dif directions- interferenceo constructive peaks & troughs matcho destructive peaks & troughs are opposite- double slito - use trigonometry to find angleo corresponds to different constructive/destructiveo don’t need to worry about math yet…observations during labdoes the light go into the shadow region? -yes, even when partially covered, the light still goes into the shadow region.1.3 – there is a bright spot at the center (constructive wave)1.4L=1mW = .5 cm = .005 m=.0024999948 (radians)=632.8e-9 ma*sin = a=2.53e-4 m = .253 mm (off by .53)1.5 interference: double slitL = 1 mY= .3 cm = .0003 md= .250 mm = .00025 mm= 1d*(y/L) = m* = 7.5e-8 m1.6number of slits per mm = 300300 * 1000 = 300,000reciprocal = 1/300,0001/3000 = dy1 = 10.2 cm = .102 mL=52 cm = .52 mtan = Y1/2L = .098d (y/L) = m = 6.54e-7 my2 =21.9 cm = .219 mL=52 cm = .52 mtan =Y2/2L = .2075d (y/L) = m = 7.02e-7
View Full Document
Unlocking...