Light

Light travels in waves, the longer the wavelength, the less frequency it has, which means the weaker it is. A light wave can be either reflected, absorbed or transmitted. An object that's black has all of its colour absorbed that no light can be reflected, which then makes black the hottest. An object which is white has a mixture of different colours

In the experiment, the darker colours will absorb the light, the lighter ones will reflect, but all of them will have light transmitted through them, especially the ones with cellophane.

Experiment Set Up

This is basically what my experiment looks like. My results will be up in the next 2 posts.

Results 3

28 May
Before After
(a) 15.5 > 16.5
(b)15.5 > 17.5
(c)15.51 > 17.2
(d)15.5 > 17.2
(e)15.5 > 18
(f)15.5 > 17.2
(g)15.5 > 17.8
(h)15.5 > 18
(i)15.5 > 17

Results 2

26th May 2010
Before After
(a)15.5degrees C > 16.4C
(b)15.5degrees C > 17.2degrees C
(c)15.5degrees C > 17.2degrees C
(d)15.5degrees C > 16.9degrees C
(e)15.5degrees C > 18.2degrees C
(f)15.5degrees C > 17.3degrees C
(g)15.5degrees C >18.1degrees C
(h)15.5degrees C > 17.9degrees C
(i)15.5degrees C > 17.1degrees C

Results 1

On the 24th of May at 6:08, I started my experiment

Temperature of Water Before Light

(a)6ml of white paint =15.2 degreesC

(b)2ml black, 4ml white = 15.2degreesC

(c)3ml white, 3ml black =15.1degreesC

(d)2ml white, 4ml black =15.2degreesC

(e)6ml black =15.2degreesC

(f)Yellow cellophane =15.2degreesC

(g)Blue cellophane =15.3degreesC

(h)Red cellophane =15.2degreesC

(i)Control =15.2degreesC


Temperature After Light

(a)16.4degrees C

(b)17degrees C

(c)17.4degrees C

(d)16.7degrees C

(e)17.8degrees C

(f)17 degrees C

(g)17.8 degreesC

(h)17.5 degrees C

(i)17 degreesC

Climate Graph

This is my fail attempt at scanning a photo. You can probably read the labels though

Research

I will need to research quite a few things, such as:
-electromagnetic waves
-absorption of light
-visible light
-heat energy
-the eye

As I get further into the experiment, the list would probably grow. Fabulous.

Cellophane

Iwill have to make sure my cellophane are all from the same brand so that the chemicals or materials it is made up of stays consistent. I will need to research cellophane if that absorbs heat or not.
I'm pretty sure that I learnt from last year's light topic was that your filter, and in this case the cellophane, will absorb the colour it is made of and reflect the rest. This shows that the cellophane will absorb the heat in some cases, and at other times, reflect.

Absorption goes hand in hand with the heat, the more light it absorbs, the hotter it is.

Method

Before I write out my method, I need to write out how to set up the equipment.

Set up Equipment
1. Paint container with 6mL of white paint
2. Mix 2mL of white paint and 4mL of black paint and paint it on the plastic container
3. Repeat but with 3mL of each colour and paint
4. Repeat with 4mL of white paint and 2mL of black paint
5. Paint the container with 6mL of black paint
6. Wait until all the paint dries, leave it for 24 hours
7. Cover the other jars with yellow, blue and red cellophane.
8. Keep one container clear as the control.
9. Pour 100ml of water into each container.

Method
The equipment was set up and the 9 plastic containers were all set up 10 centimetres away from the light bulb. The temperature of the water in each jar was then measured and recorded. The light bulb was switched on and kept on for 1 hour. The themometer was then placed into each container and the temperature was recorded. This was then repeated 3 more times, one, 2 days later, another 4 days later and the last one 6 days later.

Variables

My independant variable will be the duration that that the light shines on the glass. My dependant variable would be the temperature of the glass jars.

Materials

My materials consist of: 15mL white paint, 15mL black paint, clear cellophane, yellow cellphane, blue cellophane, red cellophane, 9 plastic containers, water and thermometer.

Variables

My independant variables would be the conditions on where my experiment is set, the materials that I use (besides the coloured sheet) and time.
My dependant variable would be the temperature of the water, as it depends on the time. Right?? Now I'm confused.

And now I have to send my blog URL, but didn't I do that the first time? I'm so confused.

Method

My experiment would be something like:
1. buy different fabrics or cellophane or paper of shades of black to white
2. cover it around a glass or jar or a wine glass or something like that
3. put the same amount of water in each glass
4. turn on a light for 30 mins, allowing it to heat up
5. use a thermometer to see how hot each one of them are

and then voila you'll see which one will be the hottest. I'd have to make sure that they all have the same amount of water, with the same container thing and the same light thing. I'm also looking up the EM spectrum, visible light and absorption of light to get some background information.

Which shade from black to white absorbs the most heat

http://www.sciencebuddies.org/science-fair-projects/project_ideas/Phys_p030.shtml has a report and an experiment on how colour affects heat absorption. It's pretty good but I might chang the experiment a little to make it easier.
http://www.colormatters.com/science_faq.html also gave me other ways I could carry out this experiment.

I asked miss zhang about which colour absorbs more heat, and she said i could do shades of black to white and see which shade absorbs the most. Or I could also do what types of apple brown the fastest, and I could also add it with sugar and salt and vinegar and all that.

SRP ideas

I've been trying to find some SRP ideas from the science fair projects and their either way too hard, with all these scientific equipment, or too easy.
I found one on proving that dark surfaces absorb more light than light surfaces, but i don't know if that's what we're looking for.

Hello World