The discovery of photoelectricity (AQA A-Level Physics): Quizzes

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The discovery of photoelectricity
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What property defines a black body?

Absorbs & emits all wavelengths

What was the ultraviolet catastrophe?

Wave theory predicted infinite UV

In Planck's equation E=hfE = hf, what does hh represent?

Planck's constant

What is the threshold frequency in the photoelectric effect?

Min. frequency for electron emission

What happens when light intensity increases in the photoelectric effect?

More electrons emitted per second

What is the work function Φ\Phi?

Min. energy to release an electron

Why is electron emission instantaneous in the photoelectric effect?

Photon transfers energy immediately

Why does a threshold frequency exist in the photoelectric effect?

Photon energy must exceed Φ\Phi

How is maximum kinetic energy related to stopping potential VsV_s?

Ek=eVsE_k = eV_s

On a VsV_s vs ff graph, what does the gradient represent?

h/eh/e

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Thermodynamics and engines

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Special relativity

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Thermodynamics and engines

The discovery of the electron

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Special relativity

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