Practice Problems
Double Slit Interference
Directions:
On this worksheet you will be investigating the properties of
double slit interference patterns
.
omit
Question 1
Light of wavelength 460 nm passes through two slits that are separated by 3.5 µm. At what anglular deviation, as measured from the middle of the central maximum, would the 1st order bright fringes appear on a screen that is 2.6 meters away?
3.8 degrees
11.4 degrees
19.2 degrees
7.6 degrees
omit
Question 2
What is the linear separation on the screen between adjacent bright fringes?
3.45 x 10
-1
meters
omit
Question 3
In a totally darkened room, what would be the maximum possible number of bright fringes, including the central maximum, that could be viewed on the screen?
14 fringes
7 fringes
15 fringes
8 fringes
omit
Question 4
Point P has a linear deviation of 1.12 meters above the middle of the central maximum. Is point P located in a bright or dark fringe?
bright
cannot be determined
dark
omit
Question 5
If light of the same wavelength were to pass through two slits that were separated further apart, how would the distance between the bright fringes on the screen change?
the distance would increase
the distance would decrease
the distance would remain the same
omit
Question 6
If light of a longer wavelength were to pass through the original two slits, how would the distance between the bright fringes on the screen change?
the distance would decrease
the distance would increase
the distrance would remain the same
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