How did Planck modify the classical theory of blackbody radiation to correctly determine his radiation law?
Assuming that light was absorbed and emitted in discrete quantities known as "quanta" was the only way for Planck's radiation law to work empirically. He also found that the producers of the photons must have discrete energies based on Planck's constant.
C.
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In an AC series circuit the inductive reactance is 41.0 ? and the frequency is 137 Hz. What is the inductance in the circuit?
a. 4.8E–2 H b. 1.5E–1 H c. 3.0E–1 H d. 4.7E–1 H e. 2.2E–1 H
A 1.5-kg object moving along the x axis has a velocity of +4.0 m/s at x = 0. If the only force acting on this object is shown in the figure, what is the kinetic energy of the object at x = +3.0 m?
a.
18 J
b.
21 J
c.
23 J
d.
26 J
e.
8 J
The visible color of electromagnetic radiation that has the shortest wavelength is:
A) red. B) orange. C) green. D) blue. E) violet.
A parallel-plate capacitor, with air between the plates, is connected across a voltage source
This source establishes a potential difference between the plates by placing charge of magnitude 4.15 x 10-6 C on each plate. The space between the plates is then filled with a dielectric material, with a dielectric constant of 7.74. What must the magnitude of the charge on each capacitor plate now be, to produce the same potential difference between the plates as before?