Photoelectrons are ejected when monochromatic light shines on a freshly-prepared (oxide-free) sodium surface. In order to obtain the maximum increase in the number of electrons ejected per second, the experimenter needs to
a. increase the frequency of the light.
b. increase the intensity of the light.
c. increase the area illuminated by the light.
d. do all of the above.
e. do only (b) and (c) above.
e
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The bathyscaphe Trieste consists of a thin-walled but very strong cylindrical hull, 15.2 m long and 3.66 m in diameter, filled with gasoline with a density of 880 kg/m3 to make it buoyant
If it is totally submerged in seawater with a density of 1025 kg/m3 and neither rising nor sinking, what is the weight of the Trieste craft? A) 127 kN B) 227 kN C) 327 kN D) 427 kN E) 527 kN
A single slit that is 2100 nm wide forms a diffraction pattern when illuminated by monochromatic light of 680-nm wavelength
At an angle of 10° from the central maximum, what is the ratio of the intensity to the intensity of the central maximum? A) I/I0 = 0.51 B) I/I0 = 0.47 C) I/I0 = 0.43 D) I/I0 = 0.39 E) I/I0 = 0.35
The difference between a LED and a laser is that a LED has spontaneous photon emission, and a laser has _________photon emission.
Fill in the blank(s) with the appropriate word(s).
A molecule makes a transition from the J = 1 to the J = 0 rotational energy state. The wavelength of the emitted photon is 2.6 × 10^?3 m. What is the moment of inertia of the molecule (in kg ? m2)?
a. 2.9 × 10^?46 b. 5.7 × 10^?45 c. 1.1 × 10^?44 d. 1.5 × 10^?46 e. 9.1 × 10^?46