WorksheetsPhys30 Unit C7-C11 Review
Total questions: 13
Worksheet time: 3hrs 15mins
In a Young's double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to:
D/2
D 2
2D
4D
A diffraction grating is used to measure the wavelength of monochromatic light, as shown in the diagram.
The spacing of the slits in the grating is 1.00 x10-6 m. The angle between the first order diffraction maxima is 70.0o.
What is the wavelength of the light?
287 nm
470 nm
574 nm
940 nm
White light is incident on a diffraction grating. Red diffracts the farthest so forms the outer edge of the pattern. This is because
red has a higher frequency than blue
blue bends more than red
red has a larger wavelength than blue
red has a smaller diffraction grating, d, than blue
What speed would an electron have to move to have the same wavelength as a photon with 6.63 x 10−25 J? (answer as a decimal to three places in m/s)
(a)
What is the energy, in eV, of a photon that has a wavelength of 620 nm?
1eV
2eV
3eV
4eV
A metal with a work function of 3.5 eV is exposed to photons with an energy of 3.7 eV. What is the maximum kinetic energy of the emitted photoelectrons?
0.2 eV
0.9 eV
1.1 eV
7.7 eV
Two polarizing filters are set up so the transmitted light is at a maximum intensity.
Through which angle should polariser 2 be rotated so that no light is transmitted?
45º
60º
90º
180º
The light through the window makes a larger image than the window. This is because of
diffraction; light has a long wavelength
polarization; this creates longitudinal waves
dispersion; air has such a high refractive index light bends
reflection; light scatters from many directions
Calculate de-Broglie wavelength of an electron moving with velocity 107 m/s.
1.0 ×10−9 m
5 m
7.3 ×10−11 m
0.72 m
The energy of the emitted electrons in a photoelectric experiment is measured using a -----------------
In this interaction a photon hits an outer shell electron, it removes it and the photon changes its direction and loses energy
Compton scattering
Photoelectric effect
Pair production
Coherent scattering
Photoelectric effect provides the evidence for the ______ nature of radiation.
dual
wave
particle
electromagnetic
An electron scatters after an X-ray photon strikes it. If the X-ray photon's wavelength decreases 10−12m , the photon scatters at an angle of (a) degrees (answer with two digits, no decimal)
