Quantum Theory

The ____ of incandescent objects covers a broad range of wavelengths.

• a. displacement

• b. acceleration

• c. spectrum

• d. momentum

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NGSS.HS-PS4-4

Photons travel at the speed of ____.

• a. waves

• b. sound

• c. displacement

• d. light

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NGSS.HS-PS4-1

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All moving particles have a(n) ____.

• a. wavelength

• b. emission spectrum

• c. mass equal to zero

• d. work function

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NGSS.HS-PS4-1

Max Planck calculated the spectrum of radiation emitted from incandescent bodies based on his assumption that ____________

• a. energy is a wave

• b. matter is a particle

• c. matter is a wave

• d. energy appears in bundles of specific sizes

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NGSS.HS-PS4-3

In the equation E  =  nhf, which of the following is not a possible value of n?

• a. 1

• b. 3

• c. 5/4

• d. 6

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

Because the constant h is extremely ____, the energy-changing steps are too ____ to be 
 noticeable in ordinary bodies.

• a. small, small

• b. large, small

• c. large, large

• d. small, large

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A ____ is a discrete, quantized bundle of energy.


• Photoelectric effect

• Photon

• Quantized

• Proton

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NGSS.HS-PS4-3

The emission of electrons when electromagnetic radiation falls on an object is called the ____ .

• Photoelectric effect

• Compton effect

• Heisenberg uncertainty

• None of the above

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NGSS.HS-PS4-3

Incandescent bodies contain vibrating particles, which radiate electromagnetic waves.

• True

• False

• Neither A and B

• Both a and B

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NGSS.HS-PS4-3

How is a photon different from matter?

• A photon has no mass and travels at the speed of light.

• A photon has mass and travels at the speed of light.

• A proton has no mass and travels at the speed of light.

• A proton has mass and travels at the speed of light.

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NGSS.HS-PS4-3