# 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.

- amplitude
- frequency
- power
- field strength

2.

A particle's De Broglie wavelength, [math]lambda[/math], shows the ratio between Planck's constant and which of the following?

- linear momentum of a particle
- angular acceleration of a particle
- mass of a particle
- energy state of a particle

3.

[math]h/(2pi)[/math] represents the reduced Planck's constant, or the quantized form of what in quantum mechanics?

- angular frequency
- torque
- angular momentum
- angular displacement

4.

Which SI unit is used for Planck's constant?

- Joule meter
- Newton per second
- Newton second
- Joule second

5.

Planck’s constant is a constant that exists on what scale?

- macroscopic
- statistical
- atomic
- subatomic

6.

Planck's law relates to the radiation that which of the following emits in thermal equilibrium at a specific temperature?

- ideal gas
- infinite light source
- black body

7.

Taking Planck's relation [math]E = hv[/math], 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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