RelativityThere are many challenging ideas to consider when studying both Special Theory of Relativity and General Theory of Relativity. Here are some recommended videos to watch as you study. It's often necessary to repeat a section more than once to feel a little more comfortable with bold and strange new ideas about physics!A quick starter from Physics Girl on Special Relativity and the Twin ParadoxAnother starter from Crash Course on Special Relativity
The Mechanical Universe is an excellent physics video series made in the 1980s, and Episode 41: The Michelson-Morley Experiment is terrific!
The Mechanical Universe is an excellent physics video series made in the 1980s, and Episode 42: The Lorentz Transformation is terrific!This series from Minute Physics is great and each episode is short (but more than a minute!)This series from Viascience is excellent. Many episodes, but all worthwhile!This series from Fermilab is excellent, each episode about 10 minutesA good explanation of energy/mass equivalence from PBSThis series from PBS on Curved Spacetime in General Relativiy is great if you want an extra challenge!Optics• The best animation for ray diagrams: www.surendranath.org/Applets/Optics/RRCS/RRCS.html(This site may be blocked on some computers. On a Mac, open the System Preferences > Java > Security menu and add the site to the Exception Site List. Restart the browser before opening the web page.)Electricity
• Electric Field Line drawingsThis is probably the best overall applet to start with, but there are some subtle flaws:This one works well, but field lines are not shown, only field vectors:This final animation from physicsclassroom.com is good too, but again it only shows field vectors: