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Category Archives: Physics

Why do musical notes sound different on different instruments?

A musical pitch is a blend of many different frequencies beside the fundamental. Here’s a visualization of the different vibrational modes of an ideal string. The string’s movements are the sum of all these different modes simultaneously.

Music theory and quantum mechanics

In high school science class, you probably saw a picture of an atom that looked like this: The picture shows a stylized nucleus with red protons and blue neutrons, surrounded by three grey electrons. It’s an attractive and iconic image. It makes a nice logo. Unfortunately, it’s also totally wrong. There’s an extent to which [...]

How is Earth’s gravity generated?

Gravity is the warping of spacetime by mass or energy. A mass like the Earth warps spacetime so that the shortest path, the “path of least resistance,” for inertial movement is towards the Earth’s center. Using instruments like the Hubble Space Telescope, it’s possible to literally see the warping of spacetime by very massive objects [...]

May the weak force be with you

I follow science news the way normal dudes follow sports. If you’re geekily inclined like me, you may have heard that the particle physics people are getting closer to producing the Higgs boson. You may have wondered what that is exactly, and why you should care. The science press has nicknamed the Higgs “the God [...]

Dig the big bang

In Annie Hall, young Woody Allen explains to his doctor that he won’t do his homework because the universe is expanding, so what’s the point? His mother exasperatedly tells him, “You’re here in Brooklyn. Brooklyn is not expanding!” I post this because I’ve been reading Coming Of Age In The Milky Way by Tim Ferris, [...]

Here comes the sun

Today in the NY Times there’s an article about NASA’s new Solar Dynamics Observatory. Check out this amazing video of the sun in action. The sun was on my mind today anyway, it being so nice and cloudless outside. But days like today also cause me anxiety. I’m a fair-haired sunburn-prone type, and my dad [...]

How musical instruments work

There are a lot of different musical instruments out there. Just about all of them share four basic components: a harmonic oscillator, a source of noise, a control surface for modulation, and a resonator.

Jimi Hendrix, electronic musician

People had been playing electric guitar for decades before Jimi Hendrix. Mostly they used it as a louder, less effortful version of the acoustic guitar. Jimi was one of the first musicians to think of the guitar amp as a musical instrument unto itself, an early analog synth, with the guitar as a very sophisticated [...]

Wow chicka wah-wah

Say “oooh” as in “noodle.” Then say “aaah” as in “park.” When you say “oooh” your mouth is more closed, with less resonating space and a smaller opening. This configuration blocks the higher overtones of your voice. When you say “aaah” your jaw and lips open, creating more resonating space and letting more high overtones [...]

So what is the big deal with Einstein?

I’m a humanities guy, but I’ve never lost my childhood love of math and science. I’m looking forward to the Large Hadron Collider being fired up next year the way normal male Americans look forward to the NBA playoffs. I like to be an informed fan, and since Einstein is the Michael Jordan of scientists, [...]