AP Physics 2 : Electromagnetic Spectrum and Radiation

Study concepts, example questions & explanations for AP Physics 2

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Example Questions

Example Question #1 : Principles Of Quantum Mechanics

Determine the frequency of orange light, .

Possible Answers:

None of these

Correct answer:

Explanation:

Using

Converting to and plugging in values

Example Question #2 : Principles Of Quantum Mechanics

Determine the photon energy of orange light, .

Possible Answers:

None of these

Correct answer:

Explanation:

Using

is the photon energy

is Plank's constant,

is the speed of light,

is the wavelength

Converting to and plugging in values:

Example Question #3 : Principles Of Quantum Mechanics

A beam of light is traveling at approximately  in a very dense medium. Given that the frequency of the light beam is , what is the wavelength of the light beam? Suppose that the speed of light in a vacuum is 

Possible Answers:

Correct answer:

Explanation:

The wavelength of the light beam doesn't depend on the speed through the medium. As such, as can solve for wavelength  by simply solving:

Where  is frequency and  is the speed of light in a vacuum. 

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