P30 EMR Concept Check 9
Concept:
describe, qualitatively, diffraction, interference and polarization
1.
What is diffraction?
2.
Where does constructive/destructive interference occur on a screen when you do
Young’s double slit experiment?
3.
What is polarization of light? What are some of it’s uses?
Concept:
4.
Explain why destructive interference patterns occur. How does this support the wave
model of light?
Concept:
5.
describe, qualitatively, how the results of Young’s double-slit experiment
support the wave model of light
compare and contrast the visible spectra produced by diffraction gratings
and triangular prisms.
Compare and contrast the visible spectra produced by diffraction gratings and
triangular prisms.
Concept:
solve double-slit and diffraction grating problems using,
dx
d sin θ
λ= , λ=
nl
n
6.
When can you use either equation?
7.
What wavelength of light will produce a pattern of fringes 3.5 mm apart using a pair
of slits 0.50 mm apart that are 2.75 m from a screen?
8.
A diffraction grating is ruled with 10000 lines/m and the distance from the slits to the
screen is 10.2 m. When yellow-green light is incident on the slits, the distance on the
screen from the central maximum to the second order maximum is 10.4 cm.
a) What is the wavelength of light?
b) What is the distance from the central maximum to the third order minimum?
9. How far apart are the slits of a diffraction grating if the 2nd order maximum is
observed to be deviated 15.0° from the central maximum when light of wavelength
630 nm is used?
10. If the distance between the slits is doubled and the distance to the screen doubled,
what will happen to the distance between the fringes of for the same wavelength of
light?