Physics at Home Archive

How Things Fly: Kepler's Laws of Orbital Motion - Sep 1, 2013

Visit How Things Fly: Kepler's Laws of Orbital Motion to visualize the predictions of Kepler's laws.

Physclips: Gravity, Newton's laws and the orbits of the planets - Sep 1, 2013

To help visualize how planets move under the force of gravity from the sun, check out these animations from the University of New South Wales.

LaserFest - Aug 1, 2013

Check out these videos of laser light shows (from the 50th anniversary of the laser celebration).

PhET Simulation: Geometric Optics - Jul 15, 2013

Security note:
Once you have clicked on the "simulation" link below, be sure to read the Java Security Advisory before running the simulation: To do that, click the "Read now" button on the yellow band near the top of the PhET page.

Visit PhET Simulation: Geometric Optics for an interactive simulation from the University of Colorado on how to make images with a convex lens (like a magnifying glass).

MIT Technology Review: X-Rays Made with Scotch Tape - Jul 1, 2013

It's easy to produce x-rays--just unwind scotch tape (but you have to do it in a vacuum). To see how, see video in this MIT Technology Review article.

What Is a Neutrino…And Why Do They Matter? - Jun 1, 2013

Check out this PBS webpage for an introduction to neutrinos. To learn more about the different types of neutrinos, see this University of California page.

PhET Simulation: The Greenhouse Effect - May 1, 2013

Security note:
Once you have clicked on the "simulation" link below, be sure to read the Java Security Advisory before running the simulation: To do that, click the "Read now" button on the yellow band near the top of the PhET page.

Investigate climate change with this PhET simulation. You'll see how greenhouse gases keep Earth much warmer than it would be without them.

(This feature was updated on May 3, 2013.)

Earth Observatory: Solar Prominence - Apr 1, 2013

Visit Earth Observatory: Solar Prominence, and take a look at these two images of a solar prominence. How does a prominence look when you see it at the sun itself, compared when you see it against the darkness of space? When you see the prominence against the sun, it's usually called a "filament." To learn more, read the text under the images.

Kitchen Sink Experiments: Bubbles that sink: Antibubbles - Feb 1, 2013

Think about a bubble: It's a thin film of water, with air inside and outside. Now imagine the opposite of a bubble: That would be a thin film of air, enclosing water inside and surrounded by water outside. This structure is called an antibubble.

To learn how to make anti-bubbles, visit Kitchen Sink Experiments: Bubbles that sink: Antibubbles and also Science by Email--AntiBubbles.

To learn more, see this Science News Online article.

Spectral Lines - Jan 1, 2013

Auroras are produced when charged particles from the sun collide with atoms in the atmosphere and transfer energy to them. This energy is then given off as light. Check out Spectral Lines to find out how atoms produce light.

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