Electron diffraction

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Melody Haratian 2J
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Electron diffraction

Postby Melody Haratian 2J » Thu Oct 15, 2020 11:56 am

Can someone explain what electron diffraction ( option B) is from Problem 1B.3?
Problem 1B.3 in the textbook: From the following list of observations, select the one that best supports the idea that electromagnetic radiation has the properties of particles. Explain your reasoning.
A. Black-body radiation
B. Electron diffraction
C. Atomic spectra
D. The photoelectric effect

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Re: Electron diffraction

Postby JaesalSoma1E » Thu Oct 15, 2020 12:00 pm

This has to do with the principle of wave-particle duality. This means that a particle can be described as a wave. Specifically, with electrons, diffraction refers to the behavior of electrons as waves.

Praneetha Kakarla 3A
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Re: Electron diffraction

Postby Praneetha Kakarla 3A » Thu Oct 15, 2020 12:30 pm

Electron diffraction is a technique where an electron beam is shone through a sample, producing interference effects (patterns of rings & dots). The diffraction is due to the wave nature of electrons.

Audra Mcleod 3G
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Re: Electron diffraction

Postby Audra Mcleod 3G » Thu Oct 15, 2020 12:31 pm

To further elaborate, diffraction patterns are interference patterns that emerge from constructive and destructive interference. Constructive interference results from in-phase waves interacting (the peaks of each wave overlap and the troughs of each wave overlap), and destructive interference is a product of out of phase waves interacting (the peaks and troughs of each wave overlap with one another). Since this is clearly a phenomenon that occurs due to wave activity, then electrons exhibiting diffraction patterns serves as a confirmation of the wave properties of these particles.

Brett Lieuallen 2A
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Re: Electron diffraction

Postby Brett Lieuallen 2A » Fri Oct 16, 2020 10:56 am

In the wave model, energy is used to eject an electron from a substance. If the wave model were the only property of light, simply increasing the intensity of light should suffice to eject the electron. However, it was found that this does not always work. Thus, higher energy forms of light were needed to eject the electron. This shows how light does not possess just the wave properties but also particle properties

ellenulitsky Dis 1I
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Re: Electron diffraction

Postby ellenulitsky Dis 1I » Sun Oct 18, 2020 4:07 pm

To answer the multiple-choice question, the answer is electron diffraction (B). During Friday's lecture, Dr. Lavelle showed us that electrons have wave properties by visualizing the two types of diffraction patterns, constructive (waves in-phase) and destructive interference (waves out of phase). Through this, when the light was being shined through a crystal(this was the example given), particle(ie photons) created a wave-like pattern as they did not bounce back but instead created oscillations and diffractions patterns. Hope this helps!

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