1. _____ is the bending of waves as they pass by a
barrier or through an opening.
Interference
Coherence
Diffraction
None of the above
2. For two waves to interfere, they must be
_____.
diffracted
coherent
in phase
None of the above
3. The pattern of bright and dark fringes that appears
on a viewing screen after light passes through a single slit is
called a(n) _____ pattern.
diffraction
interference
transmission
None of the above
4. The bright fringe that appears directly across from
the slit in the single slit experiment is the _____ order
fringe.
zeroth
first
principle
None of the above
5. The path length difference for the waves exiting the
two slits of the double slit experiment must be equal to _____ for
a bright fringe to appear.
one wavelength
one-half wavelength
an integer number of wavelengths
None of the above
6. When white light is used in the double slit
experiment, the first order and higher bright fringes appear
_____.
white
as a rainbow
red
None of the above
7. The fringes of a diffraction grating are narrower and
sharper than the fringes of the double slit
experiment.
True
False
8. It is more useful to know the _____ for a diffraction
grating.
line density
spacing between the lines
number of lines
None of the above
9. The smaller the spacing between the lines of a
diffraction grating, the _____ the fringes.
broader
fainter
narrower
None of the above
10. The smaller the spacing between the lines of a
diffraction grating, the _____ the fringes.
more spread out
more compact
greater the number of
None of the above
11. Short wavelengths of light passed through a
diffraction grating create fringes that are _____ than long
wavelengths of light.
more spread out
more compact
brighter
None of the above
12. The spacing of the diffraction pattern on a viewing
screen does not depend on the distance from the diffraction grating
to the screen.
True
False
13. A transmission diffraction grating produces a
diffraction pattern with the first order angle at 35 degrees when
light with a wavelength of 600 nm is used, meaning the grating has
_____ lines/mm.
0.001
956
1046
None of the above
14. The path length difference between the zeroth order
bright fringe and the first order bright fringe of a diffraction
grating is _____.
zero
one-half wavelength
one wavelength
None of the above
15. A diffraction grating with 1000 lines per millimeter
has a first order diffraction angle of 25 degrees, so the
wavelength of light being used is _____ nm.
423
0.0004
250
None of the above
16. When passing white light through a diffraction
grating, the central bright fringe appears _____.
as a rainbow
as white light
dark
None of the above
17. The number of lines per millimeter of a reflection
diffraction grating can be calculated using the same formula as for
the transmission diffraction grating.
True
False
18. For reflection diffraction gratings, it is necessary
to determine the _____ in order to calculate the line density of
the grating.
reflection angle
diffraction angle
wavelength of light
All of the above