Special Relativity: Mass, and Relativistic Mass
<p>A problematic term for many aspiring physicists. Whilst the most famous equation in the world states that energy and mass are equivalent, countless textbooks and articles also like to describe it as the ‘measure of inertia’. So, which one’s correct?</p>
<p>Both of them.</p>
<p>Here’s a good example to show you what I mean.</p>
<p>At the most fundamental level, mass can be described as the inertia (resistance to a change in motion) caused by the interactions between particles and their energy fields.</p>
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