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# Planck's Relationship (Grades 11-12)

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## Planck's Relationship

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1.
Planck's relation describes the proportionality constant between the energy of a charged atomic oscillator in the wall of a black body, and the                 of its associated electromagnetic wave.
1. amplitude
2. frequency
3. power
4. field strength

2.
The DeBroglie wavelength, $lambda$, of a particle is the ratio of Planck's constant to the                                   .
1. linear momentum of a particle
2. angular acceleration of a particle
3. mass of a particle
4. energy state of a particle
3.
$h/(2pi)$ is the reduced Planck constant, which is the quantum of                      in quantum mechanics.
1. angular frequency
2. torque
3. angular momentum
4. angular displacement

4.
What are the SI units of Planck’s constant?
1. Joule meter
2. Newton per second
3. Newton second
4. Joule second
5.
Planck’s constant can be seen as a(n)                 scale constant.
1. macroscopic
2. statistical
3. atomic
4. subatomic

6.
Planck's law describes the electromagnetic radiation emitted by a(n)                       in thermal equilibrium at a definite temperature.
1. ideal gas
2. infinite light source
3. black body
7.
Taking Planck's relation $E = hv$, how can you derive the DeBroglie wavelength in terms of momentum?

8.
What was the significance of the discovery of Planck's constant?

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