3.2.2.4 - Wave-particle Duality Flashcards

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1
Q

How can you show electrons have wave-like properties?

A

Electron diffraction.

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2
Q

How can you show electrons have particle like properties?

A

Photoelectric effect.

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3
Q

De Broglie wavelength =

A

h / mv

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4
Q

What is momentum?

A

mv

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5
Q

How are diffraction patterns observed?

A

When accelerated electrons in a vacuum tube interact with the spaces in a graphite crystal.

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6
Q

In diffraction when is the spread of lines greater?

A

When the wavelength is greater.

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7
Q

What makes de Broglie wavelength smaller?

A

Increasing the seed of the electrons.

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8
Q

Describe hypothesis and evaluation?

A

When things are hypothesised other scientists have to evaluate the theory by a process known as peer review before it is published. It is then tested with experiments.

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