In a double-slit experiment, the distance between slits (d) is
4.0 mm and the slits are 1.0 m from the screen (D0). There are two
different light sources whose wavelengths are 450nm and 600nm
respectively. The intensity of the two light sources are both I0.
(10pts)
(a)If we consider the two light source separately, calculate the
light intensity on the screen. (Suppose there is no transmission
loss). (4pts)
(b)If we consider the two light sources separately and define
the light intensity between 3I0 and 4I0
asthe“brightregion”,determinetherangeofthepositionofthesecondbrightregionforeach
of the two light sources on the screen? (4pts)
(c)If the two light sources simultaneously excite the slit,
calculate the light intensity on the screen. (Suppose there is no
transmission loss). (2pts)
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