Griffin Science » Waves

Monday 3/22/10: Light Intro

Sam Harrelson — Mon, 22 Mar 2010 19:45:53 +0000

Here is a link to the presentation I had for you in class today:

http://public.iwork.com/document/?a=p103636129&d=Light.key

Make sure to review slides 18 and 19!

Scientists “See” Quantum Mechanics

Sam Harrelson — Sun, 21 Mar 2010 22:33:33 +0000

Huge news…

Scientists supersize quantum mechanics : Nature News: “A team of scientists has succeeded in putting an object large enough to be visible to the naked eye into a mixed quantum state of moving and not moving.

Andrew Cleland at the University of California, Santa Barbara, and his team cooled a tiny metal paddle until it reached its quantum mechanical ‘ground state’ — the lowest-energy state permitted by quantum mechanics.”

I’ll explain tomorrow.

Then we’ll discuss.

After that you’ll grow up, become physicists and figure out how to do this on even larger scales so humans can transfer energy and information faster than the speed of light.

Woah.

March 17, 2010: History of Electromagnetism Review

Sam Harrelson — Wed, 17 Mar 2010 19:18:38 +0000

Tomorrow we’ll be wrapping up on our brief tour of the history of electromagnetism. Please make sure to review your notes in case I have a *SURPRISE* for you in class.

In the meantime, go watch this lecture:

Fantastic.

March 16, 2010: History of Electromagnetism pt 2

Sam Harrelson — Tue, 16 Mar 2010 19:54:02 +0000

History of Electromagnetism Part 2 from Sam Harrelson on Vimeo.

Keep reviewing your notes!

Sound Test Study Guide

Sam Harrelson — Thu, 11 Mar 2010 16:50:26 +0000

Our Test on Sound is Friday.

Here’s our study guide.

Enjoy and let me know if you have questions!

Sound Test Study Guide ;

LRAD and the Sound Cannon

Sam Harrelson — Wed, 03 Mar 2010 00:29:14 +0000

Like anything, sound can be used as a weapon. This is especially true because sound is a disturbance of energy. In some cases, that energy can be at such high levels that it causes pain to humans.

In this case, the US Military has been experimenting with using the LRAD (Long Range Acoustic Device) as a deterrent to potential adversaries.

It’s not pleasant to talk about weapons, etc but there is some interesting science in this segment…

Tacoma Narrows Bridge Videos

Sam Harrelson — Wed, 03 Mar 2010 00:18:17 +0000

Few interesting videos we discussed in 8.2 this morning…

Homework for Wednesday March 3, 2010

Sam Harrelson — Tue, 02 Mar 2010 15:59:22 +0000

You have a quiz on 16.1 and 16.2 tomorrow.

Study!

Seeing Sound Waves

Sam Harrelson — Sun, 28 Feb 2010 16:20:27 +0000

Awesome:

(Turn Your Speakers DOWN!)

What Is Time?

Sam Harrelson — Sun, 28 Feb 2010 01:18:42 +0000

What Is Time? One Physicist Hunts for the Ultimate Theory | Wired Science | Wired.com: “I’m trying to understand how time works. And that’s a huge question that has lots of different aspects to it. A lot of them go back to Einstein and spacetime and how we measure time using clocks. But the particular aspect of time that I’m interested in is the arrow of time: the fact that the past is different from the future. We remember the past but we don’t remember the future. There are irreversible processes. There are things that happen, like you turn an egg into an omelet, but you can’t turn an omelet into an egg.”

I love this stuff.