Outdoor Solar Lights

hydrogen and helium completely dominate the light spectrum during brightening, and the spectral lines are blue shifted compared with the light from the light source before brightening, what would you be observing?

I would say it’s a supernova.
The blue relative shift would be due to the sudden collapse before explosion.

No quasar has anything as small as 100 x solar luminosity.
Three days is a typical time period for observation of supernova events.
Hydrogen and helium are the elements which would dominate the upper layers of a red giant about to pop.

From red light through blue light, the solar spectrum exhibits weak hydrogen lines because:
A. The sun is hydrogen poor.
B. The sun’s surface is too cool to collisionally excite many hydrogen atoms to the first excited state, which is necessary for the production of absorption lines at wavelengths that the eye can see.
C. The sun’s surface is too cool to collisionally excite many hydrogen atoms to the first excited state, which is necessary for the production of Balmer series absorption lines.
D. The sun’s surface is too cool to collisionally excite many hydrogen atoms beyond the ground state, so mostly absorption lines that the eye cannot see are produced.

E. The sun’s surface is too cool to collisionally excite many hydrogen atoms beyond the ground state, so mostly Lyman series absorption lines are produced.
F. B & C
G. B & D
H. B & E
I. C & D
J. C & E
K. D & E
L. B & C & D
M. B & C & E
N. B & D & E
0. C & D & E
P. B & C & D & E

L) B & C & D are correct

The visible-light Balmer absorption lines of hydrogen are produced by electrons moving from the 1st excited state to a higher orbit. However in the Sun class stars the 1st excited state is not as densily populated as for instance in A-class stars.

From red light through blue light, the solar spectrum exhibits weak hydrogen lines because:
A. The sun is hydrogen poor.
B. The sun’s surface is too cool to collisionally excite many hydrogen atoms to the first excited state, which is necessary for the production of absorption lines at wavelengths that the eye can see.
C. The sun’s surface is too cool to collisionally excite many hydrogen atoms to the first excited state, which is necessary for the production of Balmer series absorption lines.
D. The sun’s surface is too cool to collisionally excite many hydrogen atoms beyond the ground state, so mostly absorption lines that the eye cannot see are produced.

E. The sun’s surface is too cool to collisionally excite many hydrogen atoms beyond the ground state, so mostly Lyman series absorption lines are produced.
F. B & C
G. B & D
H. B & E
I. C & D
J. C & E
K. D & E
L. B & C & D
M. B & C & E
N. B & D & E
0. C & D & E
P. B & C & D & E

L) B & C & D are correct

The visible-light Balmer absorption lines of hydrogen are produced by electrons moving from the 1st excited state to a higher orbit. However in the Sun class stars the 1st excited state is not as densily populated as for instance in A-class stars.

Or does the sun block out the light from other stars? Just wondering, because I was looking at the blue dot photo of Earth and I don’t see any stars.

You didn’t see any stars because the Picture was a fake, just like the moon landing.
If there were stars in the photo, astronomy experts would be able to pinpoint and identify that the position of the stars and constellations were all wrong, so the CIA and the MIB’s made sure that no discernable star formations could be seen in the fabricated space pictures. It’s all a conspiracy perpetrated by the man see?

Or does the sun block out the light from other stars? Just wondering, because I was looking at the blue dot photo of Earth and I don’t see any stars.

You didn’t see any stars because the Picture was a fake, just like the moon landing.
If there were stars in the photo, astronomy experts would be able to pinpoint and identify that the position of the stars and constellations were all wrong, so the CIA and the MIB’s made sure that no discernable star formations could be seen in the fabricated space pictures. It’s all a conspiracy perpetrated by the man see?

It’s near the rearview mirror, on the roof. It’s just a little hole in the roof during the day, but at night it emits a blue-ish glow. Is it a solar powered light? There is no mention of it in the owners manual and I looked online….maybe another owner has figured it out?

It’s just an L.E.D. light used to cast a a small amount of light around the shift area at night. GM are starting to put these in their vehicles. HHRs have one; some other GM vehicles (like the newer Saturns) have two.

I know, it freaked me out too when I first saw it.

It’s near the rearview mirror, on the roof. It’s just a little hole in the roof during the day, but at night it emits a blue-ish glow. Is it a solar powered light? There is no mention of it in the owners manual and I looked online….maybe another owner has figured it out?

It’s just an L.E.D. light used to cast a a small amount of light around the shift area at night. GM are starting to put these in their vehicles. HHRs have one; some other GM vehicles (like the newer Saturns) have two.

I know, it freaked me out too when I first saw it.

I remembered my solar calculator can work under dim electric light.

So when deciding on what to use as decorations to use on the table, solar panels was considered. The blue distorted reflections looks really good to be the base of the table.

But when i called up my local distributors, none believe that the panels can generate electricity under normal light. So is there such a thing?

Solar panels absorb specific frequencies of electromagnetic radiation. Not all light is created equal. Light is usually characterized by its black body temperature. Its essentially the temperature of the source but it defines the frequencies of light.

The sun is a black-body source at 6000 K
Green House light bulb 5900K
Florescents 4100K
Halogen: 3200K
Incandescents: 2600K

Since solar panels are engineered for the sun, the closer you get to the sun frequencies the more power you will produce. A solar panel will generate voltage form any black body source since each source is a continuous spectrum of frequencies, just in different magnitudes. A LED light however is a specific frequency and may not produce any voltage when applied to a solar cell.

Intensity is another consideration. If you put a solar cell directly beneath a halogen light it is certainly going to produce more than on the other side of the room.

Specificaly to your question: Yes, all solar panels produce electricy in room light. It is a small fraction of Solar radiation and will vary depending upon the intensity and frequency.

Hope that helps!

sky is the part of space . space is dark, Only we can see some thing when it is reflected by any focus of light . we see day light on earth due to solar ray reflection. But there is nothing in the blue sky to be reflected . only when there is cloud we can expect to see reflection. But why we do not see it as dark when the sky is clean???

Light particles are little waves of energy. Blue light has a very short wavelength. I believe violet is the shortest. Red is the longest. When light from the sun hits the air, the light particles with short wavelengths get scattered by the air molecules. The particles with long wavelengths aren’t affected as much and they travel in more straight lines.

The blue light that we see has been refracted by the atmosphere. Other wavelengths of light don’t get refracted to the same degree, so it’s the blue light that spreads around the sky, and eventually hits our eyes.

sky is the part of space . space is dark, Only we can see some thing when it is reflected by any focus of light . we see day light on earth due to solar ray reflection. But there is nothing in the blue sky to be reflected . only when there is cloud we can expect to see reflection. But why we do not see it as dark when the sky is clean???

Light particles are little waves of energy. Blue light has a very short wavelength. I believe violet is the shortest. Red is the longest. When light from the sun hits the air, the light particles with short wavelengths get scattered by the air molecules. The particles with long wavelengths aren’t affected as much and they travel in more straight lines.

The blue light that we see has been refracted by the atmosphere. Other wavelengths of light don’t get refracted to the same degree, so it’s the blue light that spreads around the sky, and eventually hits our eyes.