Exam
8A
Name___________________________________
MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
1)
A double slit system is used to measure the wavelength of light. The system has slit spacing
d=15 micron and slittoscreen distance L=2.2m. If the m=1 maximum in the interference
pattern occurs 7.1cm from the screen center, what is the wavelength of the light?
A) 375nm
B) 400nm
C) 425nm
D) 450nm
E) 475nm
1)
2)
Blue light of a given wavelength passes through a single slit of width d and forms a diffraction
pattern on a screen. If the blue light is replaced by red light with twice the wavelength, the
original diffraction pattern can be reproduced if the slit width is changed to:
A) d/4
B) d/2
C) 4d
D) 2d
E) no change needed
2)
3)
In a 7slit system, how many minima lie between the zerothoder and firstorder maxima?
A) 1
B) 4
C) 5
D) 6
E) 7
3)
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 Spring '05
 wurthmeir
 Diffraction, Light, Wavelength, minimum wavelength difference

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