Outdoor Solar Lights

For decades we know that luminous matter – what we see as our sovereign Sun emits electromagnetic radiation, or light, radio waves and X ray to penetrate the outskirts of the Solar System causing different colors and brightness in plasma crystals name "star", other than those with clouds aneliformes in its return caoticamente interpreted as other galaxies. Otherwise the dark matter that is just an evocative name for lack of light, or has no light itself, but it makes a difference in the darkness around them.

For this, just that you will be able to see through the very consciousness that difference of light and lack of it (dark).

You can?

Alright, this is hard to parse, but not impossible.

The spin rate of an edge on galaxy can be determined by Doppler shift. One can estimate the amount of mass by looking at the total brightness, and looking for the gas and dust. And you can find the distance to the galaxy by looking at certain variable stars, etc. You can see the apparent size of the galaxy, and with the distance, you can figure out how big it is. When you combine all this, you find that there isn’t nearly enough mass to make the galaxy spin at the rate you measured. There must be more mass. This is called Dark Matter. It’s primarily called "Dark" because we have no idea what it is. It’s not just that it does not emit any kind of light.

But we now know a considerable amount about what it isn’t. It’s not free floating cold planets or other objects that are just too dim, at least not much of it. It’s not black holes or neutron stars. It’s not neutrinos – they don’t have enough mass or the right behavior. That leaves an undiscovered particle that does not interact with other stuff much, if at all, except by gravity, and it has some odd properties of it’s own where it doesn’t just gravitationally collapse into tiny clumps.

So, how does one detect dark matter? Well, it has gravity, and gravity can bend light. So very large clumps of it can be detected statistically by looking for changes to the light from background sources – mostly galaxies. It’s very hard, but has been done.

2.In what way are the planets mars, mercury, and earth similar?1)They have same period of revolution.2)they are perfect spheres.3)they exert the same gravitational force on each other.4)they have elliptical orbits with the sun at one focus.

3.which type of land surface would probably reflect the most incoming solar radiation?1)light colored and smooth.2)light colored and rough.3)dark colored and smooth.4)dark colored and rough.

thx =)

1. 2
2. 4
3. 1

It’s pretty much just common sense.

2.In what way are the planets mars, mercury, and earth similar?1)They have same period of revolution.2)they are perfect spheres.3)they exert the same gravitational force on each other.4)they have elliptical orbits with the sun at one focus.

3.which type of land surface would probably reflect the most incoming solar radiation?1)light colored and smooth.2)light colored and rough.3)dark colored and smooth.4)dark colored and rough.

thx =)

1. 2
2. 4
3. 1

It’s pretty much just common sense.

A few years ago I saw a rainbow coloured ribbon of light in broad daylight. Clear day as in no clouds.

(My question is, What did I see?)

I don’t know what the ribbon of light was, it clearly seemed transparent (My closest guess is that it was an aurora or something to do with solar charged particles entering the atmosphere).

But what created doubt was that it was only in one spot, broad daylight. Size would be roughly close to a plane quite high up in the air.

It seemed like an aurora because it was slightly moving like a ribbon in the wind.

The location was near Shanghai in China. Season was approximately spring.

I don’t know if there are aurora’s in that location, especially in broad daylight and at a minute scale compared to ones I’ve seen in videos.

I live in Australia so I have never seen the northern lights before.

It also seemed like a mystical colored dragon swaying in the air.

I saw a video on youtube and it looked closely related to the following videos:

http://www.youtube.com/watch?v=No67e3l4Hyc

The first video resembled it more, it clearly had an aurora like appearance but was in one location at the whole time.

http://www.atoptics.co.uk/
This site is called Atmospheric Optics. There are some very good pictures of what you saw even on their home page. For every atmospheric effect, they give you a very good scientific reason telling you exactly why you see what you see. This is one of my very favorite websites ever but I want to warn you that you can spend hours here looking at all the incredible things and it will only seem like a few minutes. I hope that you enjoy this as much as I do.

if these pinwheels gain momentum from light, then how is this possible? does it have to do with the white/black colors? does say the heat in the bulbs play a factor? and if light can be used as a propellent, then wouldnt it be true if you shined a flashlight towards a piece of paper, in a zero G environment (space), the piece of paper would be propelled by the light?

It turns out that the actual reason these things (called radiometers) turn has less to do with light pressure and more to do with the fact that there’s not a perfect vacuum in them. There’s enough vapor to get convection going, so they’re propelled by the movement of gas.

For a more complete explanation, see http://en.wikipedia.org/wiki/Crookes_radiometer

if these pinwheels gain momentum from light, then how is this possible? does it have to do with the white/black colors? does say the heat in the bulbs play a factor? and if light can be used as a propellent, then wouldnt it be true if you shined a flashlight towards a piece of paper, in a zero G environment (space), the piece of paper would be propelled by the light?

It turns out that the actual reason these things (called radiometers) turn has less to do with light pressure and more to do with the fact that there’s not a perfect vacuum in them. There’s enough vapor to get convection going, so they’re propelled by the movement of gas.

For a more complete explanation, see http://en.wikipedia.org/wiki/Crookes_radiometer

I think you can buy them at maplin from their online store

1.The transfer of thermal energy by conduction and convection DOES NOT require matter
2.The transfer of thermal energy by radiation DOES NOT require matter
3.A material that allows heat to pass through it easily is and INSULATOR
4.Insulation rated R-35 allows MORE heat to pass through it than insulation rated R-1
5Solar collectors are used in PASSIVE solar heating systems
6A solar heating system that does not use fans or electrical devices is AN ACTIVE solar heating system
7A steam engine is an example of an INTERNAL combustion engine
8.The fuel of an external combustion engine is burned OUTSIDE the engine
9.A STEAM-HEATING system uses radiators to transfer thermal energy
10.Refrigerators and air conditioners are HEAT PUMPS
11Steam-heating systems require MORE water than hot-water systems
12cause dark colors REFLECT more radiant energy than light colors, solar collectors are usually painted black
13Many external combustion engines are TURBINES to produce mechanical energy

1. False, Does
2. True
3. False, Conductor
4. False, less
5. True
6. False Inactive
7. False external
8. True
9. False, Water-heating
10.True
11. True
12. False, Absorb
13. True

1.The transfer of thermal energy by conduction and convection DOES NOT require matter
2.The transfer of thermal energy by radiation DOES NOT require matter
3.A material that allows heat to pass through it easily is and INSULATOR
4.Insulation rated R-35 allows MORE heat to pass through it than insulation rated R-1
5Solar collectors are used in PASSIVE solar heating systems
6A solar heating system that does not use fans or electrical devices is AN ACTIVE solar heating system
7A steam engine is an example of an INTERNAL combustion engine
8.The fuel of an external combustion engine is burned OUTSIDE the engine
9.A STEAM-HEATING system uses radiators to transfer thermal energy
10.Refrigerators and air conditioners are HEAT PUMPS
11Steam-heating systems require MORE water than hot-water systems
12cause dark colors REFLECT more radiant energy than light colors, solar collectors are usually painted black
13Many external combustion engines are TURBINES to produce mechanical energy

1. False, Does
2. True
3. False, Conductor
4. False, less
5. True
6. False Inactive
7. False external
8. True
9. False, Water-heating
10.True
11. True
12. False, Absorb
13. True

does anyone speak gaylien? their spaceships keep hovering over the patio…
it must be the constant colour changes.

have the garden gnomes or pink flamingoes interpret for you~