Total Posts:3|Showing Posts:1-3
Jump to topic:

Lesson 1 - Electromagnetic waves

Fukkum
Posts: 4
Add as Friend
Challenge to a Debate
Send a Message
1/16/2014 9:32:28 AM
Posted: 2 years ago
<span style="text-decoration: underline">Definitions</span>

Crest - mountain (As the waves go in an up and down pattern)

Trough - valley

Amplitude - distance between rest line and the crest/trough (Depending on that, a certain amount of light is emitted)

Wavelength - distance between two crests/troughs (Depending on that, it is a certain color)

Frequency - I'll put this simply: how fast an individual wave passes

<span style="text-decoration: underline">Relation between wavelength and frequency</span>

They are inversely related.

If the wavelength is long, it slows down the rate at which an individual wave passes

<span style="text-decoration: underline">Relation between energy and frequency</span>

They are directly related.

The more energy is transmitted, the closer two crests/troughs are, thus the individual waves pass faster.

<span style="text-decoration: underline">Waves</span>

Radio waves - Microwaves - Infrared - Visible light - Ultraviolet - X-rays - Gamma rays

From the waves on the left, to the ones on the right are decreasing in wavelength. Though, only visible light is visible. That is where the electromagnetic spectrum originated too. Here's the order of the Rainbow, from the top to the bottom:

Violet, Indigo, Blue, Green, Yellow, Orange, Red

<span style="text-decoration: underline">Where the spectrum originated</span>

People have tested this. This is also how the Rainbow appears. When there is light, and there is a prism next to it, the prism disperses (Splits up) the light into its component colors, then refracting it from the other side.
Fukkum
Posts: 4
Add as Friend
Challenge to a Debate
Send a Message
1/16/2014 9:41:36 AM
Posted: 2 years ago
At 1/16/2014 9:36:57 AM, Lazarius wrote:
How are our surroundings black when there's no light? Why coloured when there IS light?

As I said, white light is composed of red, orange, yellow, green, blue, indigo, and violet. So, depending on an object's molecules, it reflects one of those colors, while absorbing the others. Black objects only absorb, not reflect. However, when say, a room is not illuminated, not even in the very least, no objects in the room reflect any color.