## Problem 1.21 6th Ed.

$c=\lambda v$

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Joined: Tue Nov 28, 2017 3:02 am

### Problem 1.21 6th Ed.

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.
(b) Electron diffraction.
(c) Atomic spectra.
(d) The photoelectric effect.

I chose d) which is the correct choice. Here is my reasoning:
The photoelectric effect act like particles due to its influence of electrons on metals. These energizes packets of photons collide with electrons transferring energy and producing momentum. The photoelectric effect also disproved a wavelike quality of increasing light intensity to remove electrons from a metal surface.

Does my reasoning make sense? And is there ways to improve it? I would love to hear other answers as well.

Fanny Lee 2K
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

### Re: Problem 1.21 6th Ed.

Yes you touched upon the important aspects of what the photoelectric effect shows in which electromagnetic radiation has the properties of particles. Albert Einstein suggested that light consisted of particles (or packets) of energy called photons. The energy of the photon has energy when you multiply Planck's constant and the frequency.