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A system of several identical parallel narrow slits is illuminated with blue
light of wavelength
nm. The interference pattern shown in
Fig. 1 is observed on a distant screen.
- (a)
- How many slits are there?
- (b)
- What is the separation between the slits? Compare your answer
to the typical thickness of a human hair, about 0.01 cm.
- (c)
- If the screen is placed 1 m away from the slit system, what
is the distance on the screen between the neighbouring principal maxima
of light intensity? Between neighbouring minima?
Figure:
Interference pattern observed on a distant screen.
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Tomas Arias
2003-11-09
![\includegraphics[scale=1.0]{interfere1.eps}](img3.png)