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10 great physics courses you can take online right now, for free
Here are 10 physics courses you can take now with some of the best experts in the world.
- You can find numerous physics courses currently available online for free.
- Courses are taught by instructors with amazing credits like Nobel Prizes and field-defining work.
- Topics range from introductory to Einstein's theory of relativity, particle physics, dark energy, quantum mechanics, and more.
The internet has in many ways fulfilled its educational promise and can be an amazing resource to learn pretty much anything. This is especially true if you have an interest in physics, the study of matter, energy and the fundamental interactions and forces of our universe. There are hundreds of great free courses available, with field-leading and even Nobel Prize-winning instructors.
To get you started, we distilled through the resources to come up with a list of 10 courses you can take right now and get your physics journey under way.
Here we go:
A great intro course that looks at physics in the context of everyday objects and processes. How does skating work? Why do things fall? The course uses the cases of ramps, wheels, bumper cars and more to illuminate the physics of life around you. It is taught by the University of Virginia physics professor Louis A. Bloomfield, a noted science educator, lecturer, author, as well as tv host.
If you want to brush up on the essential concepts of physics, this course from Yale University might be for you. Taught by the physics professor Ramamurti Shankar, the lessons cover the principles and methods of physics, focusing on problem solving, quantitative reasoning and such concepts as Newtonian mechanics, special relativity, gravitation, waves, and thermodynamics.
Would you like to know about some of the most mysterious phenomena in the Universe? This fun course will bring you up to speed on white dwarfs, supernovae, neutron stars and black holes.
The 9-week course from the Australian National University has over 60,000 people enrolled, and is taught by Brian Schmidt, a Nobel Prize-winning physicist for his work on discovering dark energy. His co-teacher is the science educator and astrophysics researcher Paul Francis, who has a PhD from the University of Cambridge and has worked with NASA. He is particularly known for working on the spectra of quasars.
Want to get a general introduction to some of the main ideas about how the Universe was formed and where it's going? The Big Bang, the formation of the elements, the Higgs Boson, dark matter, dark energy and anti-matter all feature prominently in this 14-hour course, offered by the University of Tokyo.
It is taught by Hitoshi Murayama, a University of California, Berkley physics professor and the Director of Kavli Institute for the Physics and Mathematics of the Universe.
Want to understand Electricity and Magnetism? Take this course that currently has over 16,000 online students! This course was created by Scott Redmond, who worked previously in support of the International Space Station as a Mission Operations Analyst and conducted astronaut training before turning to teaching physics. The course offers 46 lectures in over 4 hours of video content and additional materials.
This interesting 8-week course, taught by Stanford University's Academic Director and historian of science Larry Randles Lagerstrom, goes deep into how Einstein came up with his famous theory. While setting up the background in both history and theory, the class provides a richer understanding of the theory of relativity itself.
This advanced 7-week course from MIT will teach you the basics of quantum mechanics, introducing such concepts as wavefunctions, the Schrodinger equation, uncertainty relations and the properties of quantum observables. The course is intended for people with previous college-level calculus and physics courses under their belt.
The currently archived but available course is taught by the MIT physics professor Barton Zwiebach, a specialist in string theory and theoretical particle physics, along with MIT physics lecturer Jolyon Bloomfield.
If learning about the workings of very small things sounds appealing and you love supercolliders, this is the course for you. In this class you will learn about subatomic physics, including the properties of atomic nuclei, how to detect and accelerate particles, as well as about electromagnetic, strong and weak interactions. And, of course, the Higgs Boson makes an appearance. The lessons will also talk about how to connect particle physics to astrophysics and the larger questions of the Universe.
This 31-hour course from the University of Geneva is taught by professor Marin Pohl, who works in experimental particle physics on European colliders like the LHC (Large Hadron Collider) in Switzerland. His current focus is astroparticle physics in space. The course's second teacher is assistant professor Anna Sfyrla, an experimental particle physicist, who teachers at the University of Geneva.
Is the Universe made of strings? If you're ready to dive into some of the headier explanations for everything in existence, take this great master class which can be completed in a few hours. It is taught by the Harvard University physics professor and string theory expert Cumrun Vafa, and was developed with the world-renowned string theorist Andrew Strominger.
If you want to further under understanding of Einstein's theory of relativity, you'd be interested in its connection to astronomy as explored in this course from Cornell University. Taught by astronomy professor David F. Chernoff, an expert in theoretical astrophysics, the lessons will deepen your knowledge by zeroing in on special and general relativity as well as experimental tests you can carry out to study them. You will also get to analyze paradoxes in special relativity and learn how relativity affects daily situations.
The prerequisite for this 4-week (currently archived but available) course requires at least high school level math and physics or an intro college course in both.
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The team caught a glimpse of a process that takes 18,000,000,000,000,000,000,000 years.
- In Italy, a team of scientists is using a highly sophisticated detector to hunt for dark matter.
- The team observed an ultra-rare particle interaction that reveals the half-life of a xenon-124 atom to be 18 sextillion years.
- The half-life of a process is how long it takes for half of the radioactive nuclei present in a sample to decay.
Gender and sexual minority populations are experiencing rising anxiety and depression rates during the pandemic.
- Anxiety and depression rates are spiking in the LGBTQ+ community, and especially in individuals who hadn't struggled with those issues in the past.
- Overall, depression increased by an average PHQ-9 score of 1.21 and anxiety increased by an average GAD-7 score of 3.11.
- The researchers recommended that health care providers check in with LGBTQ+ patients about stress and screen for mood and anxiety disorders—even among those with no prior history of anxiety or depression.
Study findings<p>For the study, <a href="https://link.springer.com/article/10.1007/s11606-020-05970-4" target="_blank">published in the Journal of General Internal Medicine</a><em>, </em>Flentje and her team evaluated survey responses from nearly 2,300 individuals who identified as being in the lesbian, gay, bisexual, transgender, and queer (LGBTQ+) community. Most of the participants were white, while nearly 19 percent identified as a racial or ethnic minority. Multiple genders were represented with cisgender women (27.2 percent) and men (24.6 percent) making up a majority of the participants. Sixty-three percent had been assigned female at birth. For the most part, participants identified their sexual orientations as queer (40.3 percent), gay (36.5 percent), and bisexual (30.3 percent).</p><p>The JGIM study participants were recruited from the 18,000-participant <a href="https://pridestudy.org/" target="_blank">PRIDE Study</a> (Population Research in Identity and Disparities for Equality), which is the first large-scale, long-term national study focusing on American adults who identify as LGBTQ+. It conducts annual questionnaires to understand factors related to health and disease in this population. </p><p>Participants filled out an annual questionnaire (starting in June 2019) and a COVID-19 impact survey this past spring. Flentje noted that on an individual level, some people may not have experienced a big change in anxiety or depression levels, but for others there was. Overall, depression increased by a <a href="https://patient.info/doctor/patient-health-questionnaire-phq-9" target="_blank">PHQ-9 score</a> of 1.21, putting it at 8.31 on average. Anxiety went up by a <a href="https://www.mdcalc.com/gad-7-general-anxiety-disorder-7" target="_blank">GAD-7</a> score of 3.11 to an average of 8.89. Interestingly, the average PHQ-9 scores for those who screened positive for depression at the first 2019 survey decreased by 1.08. Those who screened negative for depression saw their PHQ-9 scores increase by 2.17 on average. As for anxiety, researchers detected no GAD-7 change among the study participants who screened positive for anxiety in the first survey, but did see an overall increase of 3.93 among those who had initially been evaluated as negative for the disorder. </p>
Risks among gender and sexual minorities<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="fc3fd1ae68b77bbbf58a6995638d6d65"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/EnUqDjCqg0A?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p>The LGBTQ+ community is a vulnerable population to mental health concerns because of their fear of stigmatization and previous discriminatory experiences.</p> <p>Previous research by the Human Rights Campaign has found "that LGBTQ Americans are more likely than the <a href="https://medicalxpress.com/tags/general+population/" target="_blank">general population</a> to live in poverty and lack access to adequate medical care, paid <a href="https://medicalxpress.com/tags/medical+leave/" target="_blank">medical leave</a>, and basic necessities during the pandemic," said researcher Tari Hanneman, director of the health and aging program at the campaign.</p> <p>"Therefore, it is not surprising to see this increase in anxiety and depression among this population," Hanneman said in the release. "This study highlights the need for <a href="https://medicalxpress.com/tags/health+care+professionals/" target="_blank">health care professionals</a> to support, affirm and provide <a href="https://medicalxpress.com/tags/critical+care/" target="_blank">critical care</a> for the LGBTQ community to manage and maintain their mental health, as well as their physical health, during this pandemic."</p>
What should health care providers do?<p>The authors of the study recommend that health care providers check in with LGBTQ+ patients about stress and screen for mood and anxiety disorders in members of that community—even among those with no prior history of anxiety or depression.</p><p>As cases of COVID-19 continue to mount, the sustained social distancing, potential isolation, economic precariousness, and personal illness, grief, and loss are bound to have increased and varied impacts on mental health. Effective treatments may include individual therapy and medications as well as more large-scale coronavirus support programs like peer-led groups and mindfulness practices. </p><p>"It will be important to find out what happens over time and to identify who is most at risk, so we can be sure to roll out public health interventions to support the mental health of our communities in the best and most effective ways," said Flentje.</p>
What we know about black holes is both fascinating and scary.
- When it comes to black holes, science simultaneously knows so much and so little, which is why they are so fascinating. Focusing on what we do know, this group of astronomers, educators, and physicists share some of the most incredible facts about the powerful and mysterious objects.
- A black hole is so massive that light (and anything else it swallows) can't escape, says Bill Nye. You can't see a black hole, theoretical physicists Michio Kaku and Christophe Galfard explain, because it is too dark. What you can see, however, is the distortion of light around it caused by its extreme gravity.
- Explaining one unsettling concept from astrophysics called spaghettification, astronomer Michelle Thaller says that "If you got close to a black hole there would be tides over your body that small that would rip you apart into basically a strand of spaghetti that would fall down the black hole."