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Henry Reich

Minutephysics: cool physics and other sweet science. On Youtube.

I'm constantly in awe at the world. Isn't it spectacular? I like physics (and science in general) because the rules of physics, chemistry and biology apply regardless of opinion polls of scientists or the public. The goal of science is to find out how the world (universe, nature, etc) works by careful observation. It doesn't matter at all if you believe in a theory or not - what matters is whether nature works that way. A lot of popular ideas (for example, "the earth is flat") turned out to be wrong, and a lot of uncomfortable ideas (like quantum mechanics and plate tectonics) turned out to be right. It's a dictatorship – nature decides how nature works, and you get no vote! But you get to decide which questions to ask - and that's what makes science fun. 


Ranked: 459th in English Most Engaging This Month (by Average Reach)

Ranked: 468th in English Most Engaging This Month (by Engagement)

Ranked: 663rd in English Users (by Followers)

Ranked: 801st in Most Engaging This Month (by Engagement)

Ranked: 867th in Users (by Followers)

Ranked: 928th in Most Engaging This Month (by Average Reach)

Date Following Followers Gained
Recent Popular Posts
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About 9 weeks ago How do Modern Light Bulbs Work? NEW VIDEO!
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41 Shares
About 2 weeks ago This has nothing to do with physics, but I thought it was important so I made a video about it: uprisings in Venezuela. http://youtu.be/kmvAdRntWH8
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About 5 weeks ago NEW DISCOVERY About the Big Bang! (and a new video explaining that discovery!)
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About 6 weeks ago How much mass energy is there in a raisin? Or a mosquito? Or the earth? Find out in the newest lab from MinuteLabs
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About 9 weeks ago Are any Animals Truly Monogamous? NEW VIDEO
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18 Shares
About 3 weeks ago NEW VIDEO! Relativity Isn't Relative
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About 13 weeks ago Evolution vs Natural Selection: NEW VIDEO
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About 13 weeks ago There is a lot of discussion in various online mathematical forums currently about the interpretation, derivation, and significance of Ramanujan's famous (but extremely unintuitive) formula

1+2+3+4+... = -1/12   (1)

or similar divergent series formulae such as

1-1+1-1+... = 1/2 (2)

or

1+2+4+8+... = -1. (3)

One can view this topic from either a pre-rigorous, rigorous, or post-rigorous perspective (see this page of mine for a description of these three terms: http://terrytao.wordpress.com/career-advice/there%E2%80%99s-more-to-mathematics-than-rigour-and-proofs/  ).  The pre-rigorous approach is not particularly satisfactory: here one is taught the basic rules for manipulating finite sums (e.g. how to add or subtract one finite sum from another), and one is permitted to blindly apply these rules to infinite sums.  This approach can give derivations of identities such as (1), but can also lead to derivations of even more blatant absurdities suc