Monday, september 21st, 2009

Today we started with the Unit 2.

This unit beggins with a theme that we already saw at the end of the last unit:

¨The atom¨.

Then the next theme in this unit is the ¨Periodic table¨ (OMG! Too much elements to memorize!).

The last theme is ¨Quantum numbers¨ (My head hurts!).

Anyway, back to ¨The atom¨.

The teacher started asking about the atomic model and the light spectrum, the last themes we saw.

After that he spoke a

bout the Light.

The light can be a wave or particles. Better said, it has particles but travels in waves.

The light particles are called Photons.

Then we started with

the waves properties and types.

Crest: Is the highest point in the wave.

Wave length: Is the distance between 2 crests.

Amplitude: Is the distance between a crest and the lowest point call

ed trough.

Electromagnetic Spectrum

Radio waves: Biggest waves. Like TV., AM or FM. 3Km. To 3cm.

Microwaves: From 30cm. To 0.3cm.

Infrared: About 3 micrometers. 1000 micrometers is 1 milimeter. Infrared is familiared with heat.

Visible light: 1 micrometer to 0.4 micrometers.

Ultraviolet: 0.3 micrometers to 4 nanometers.

X-rays: From 3 nanometers to 0.3 nanometers. Can go through almost everything.

Gamma rays: Smaller than 0.3 nanometers. They go through everything. They´re radioactive and cause you harm.

Well...that was the class. And for everyone that was there: The famous and so slippery name in english of ¨valle¨ is trough. :)♥

Erin Alice Gil