Outdoor Solar Lights

(1) This contrast in color was suggestive of a solar eclipse.

(2) Together, his head and hair looked like a solar eclipse.

(3) The contrast between dark and light created the appearance of a solar eclipse.

So, what do you think? Are these sentences interchangeable? Below you will find the passge from which they have been extracted. Thank you for your suggestions.

Item 1 and item 3 are interchangeable, however the second item has an entirely different meaning. Honestly, if having to choose between 1 & 3, I wouldn’t be able to select either one as preferable to the other.

Yes its called Redshift
http://en.wikipedia.org/wiki/Redshift

my science fair question is "what color of primary light will generate the most energy from solar panels?" but i need to figure out what i mean by "most energy". Should i measure it in watts or volts or are there other ways that are more precise and i need a meter of some sort that i can measure the power with. so…. What way should i measure my solar panel output and where can i find a meter to measure it

A Volt-Ohm-Milliammeter, also known as a VOM or multimeter has a switch that sets the meter to measure voltage, resistance (ohms) or current (milliamps). Multimeters are priced from about $15 to more than $100. The more expensive ones have digital displays, more settings and more features. They are sold at Sears, Radio Shack, Home Depot, Lowes and other places.

The best way to determine solar cell output is probably to measure both the voltage and the current in the load and calculate the power from Watts = Volts X Amps. (One milliamp is 0.001 amp. You could also use a known resistance for the load and calculate power from Watts = Voltage squared / ohms or Watts = current squared X ohms. You can buy resistors at Radio Shack. You need to determine how much voltage and current the solar cell will generate and select a resistor that will draw that current when that voltage is applied. Voltage = Current X Resistance or Resistance = Voltage/Current. You also need to make sure that the expected watts won’t cause the resistor to overheat. You can connect resistors in parallel and in series to withstan more watts. Four resistors of the same ohms connected two in parallel and the pair in series with the other pair of two in parallel make the same resistance as a single resistor but withstand four times the watts.

You might also think about how to determine if you various colors of light have the same brightness. If your red light is 20% brighter than your blue light, how will you know if the change is solar cell output is due to the difference in color or the difference in brightness? Light meters are sold in photographic equipment stores, but they may be pretty expensive. You might want to look on eBay.

Blackball, blackmail, blacklist, blackmarket, black cat, etc…
It wasn’t always like that; something that was once positive is now seen as negative; it is one of the most powerful colors in existence
Here are all the real positives:- As a color black has the ability to attract to it all rays of color and light
- Black is an absorber of both light and cosmic radiation
- Black capstones were often placed on Egyptian pyramids
and obselisks because of the powers inherent in the color black
- Solar energy cells are black
- Dry cell batteries are powered by black chemicals
- Energy is drawn towards black substances where it can be stored for a determined period of time and used as needed

In actuality black has always been and will always be a source of power and influence

Here is the clearing up of some misconceptions:
- Black as a color does not denote death; in some African and Oriental traditions white is used to symbolize death

So why the negative connotation?
- In ancient Egypt, the god of the earth was represented by a black image of Osiris, who was often called the "Lord of the Perfect Black"
- The original name for Egypt was Kemet (The Black Land)
- Shrines of Black Madonna can be found throughout all of Europe
- The large block of stone in Mecca (the Ka’ba) is a black monolith of extreme importance to the Islamic community
- Judges, priests, nuns, witches, warlocks all wear black

And dont forget about the black robes that we wear when we recieve our degrees.

and it is the highest level in martial arts.

All traditions that predate white supremacist thought and are no doubt cultural vestiges from a time when Blackness was indeed the color of power.

Blackball, blackmail, blacklist, blackmarket, black cat, etc…
It wasn’t always like that; something that was once positive is now seen as negative; it is one of the most powerful colors in existence
Here are all the real positives:- As a color black has the ability to attract to it all rays of color and light
- Black is an absorber of both light and cosmic radiation
- Black capstones were often placed on Egyptian pyramids
and obselisks because of the powers inherent in the color black
- Solar energy cells are black
- Dry cell batteries are powered by black chemicals
- Energy is drawn towards black substances where it can be stored for a determined period of time and used as needed

In actuality black has always been and will always be a source of power and influence

Here is the clearing up of some misconceptions:
- Black as a color does not denote death; in some African and Oriental traditions white is used to symbolize death

So why the negative connotation?
- In ancient Egypt, the god of the earth was represented by a black image of Osiris, who was often called the "Lord of the Perfect Black"
- The original name for Egypt was Kemet (The Black Land)
- Shrines of Black Madonna can be found throughout all of Europe
- The large block of stone in Mecca (the Ka’ba) is a black monolith of extreme importance to the Islamic community
- Judges, priests, nuns, witches, warlocks all wear black

And dont forget about the black robes that we wear when we recieve our degrees.

and it is the highest level in martial arts.

All traditions that predate white supremacist thought and are no doubt cultural vestiges from a time when Blackness was indeed the color of power.

For my science project I’m testing the different densities of light on TiO2 solar cells. What does density of light mean? Does it mean the amount of light? Does it mean the concentration of light on a certain area (like a lot of light on a small area) or is it a different color of light?
I don’t really know what it means, I just picked out of a list.
Thank you!

density of light sounds like intensity which sounds like Watts.

Energy of light is solely in terms of wavelength or color.

For my science project I’m testing the different densities of light on TiO2 solar cells. What does density of light mean? Does it mean the amount of light? Does it mean the concentration of light on a certain area (like a lot of light on a small area) or is it a different color of light?
I don’t really know what it means, I just picked out of a list.
Thank you!

density of light sounds like intensity which sounds like Watts.

Energy of light is solely in terms of wavelength or color.

that deals with shining different colors of lights (ex:white,black,green,red, and blue) on a solar panel figuring out what light color makes the most electricity. for the title it would not be a question it would be something like "the solar panel project".?

Terse and catchy:
Color Power
Power of Color

Verbose and impressive:
The Effects of Frequency of Light Radiation on Power Production
Power Production as a Function of Frequency of Light

Good luck.

I know glass can be infused with metals to make stained (colored) glass. Why can’t a similar process be done to solar cells?

Short answer of course is that it could be.

However if you had a glass "front" to the silicon that is coloured, you are simply stopping some of the light from reaching the cell.

For example, if you decided to filter out all the red light, then you would lose perhaps most of the IR all of the red and some of the orange/ yellow from the spectrum. This would make the solar cell produce appreciably less electricity.

Any glass covering the cell no only wants to be clear – but also clear to IR too – as this is used by the cell more than most colours.

What was your thinking behind this please, I am curious.

Mark

I know glass can be infused with metals to make stained (colored) glass. Why can’t a similar process be done to solar cells?

Short answer of course is that it could be.

However if you had a glass "front" to the silicon that is coloured, you are simply stopping some of the light from reaching the cell.

For example, if you decided to filter out all the red light, then you would lose perhaps most of the IR all of the red and some of the orange/ yellow from the spectrum. This would make the solar cell produce appreciably less electricity.

Any glass covering the cell no only wants to be clear – but also clear to IR too – as this is used by the cell more than most colours.

What was your thinking behind this please, I am curious.

Mark