Crookes Radiometer

A Crookes radiometer is the glass bulb with the 4 black & white vanes that spin in sunlight.

Category:

Education

Tags:

• Crookes radiometer
• solar energy

[pimohdaimaoh]

because black color absorbs more heat energy when that 4 black vane absorbes heat it creates heat force in a vacuum causing them to spin, this is how heat energy creates and made force at one side into another, thats why it rotates. and how crook concludes that it can create energy from the light like sun to produce electricity (heat energy)

[DontMockMySmock]

Basically, what I am saying, is that on behalf of physics, I cordially invite you to invent a time machine, go back in time a century or so, and suck Osborne Reynolds' dick. (He was the first to describe thermal transpiration.) Just because you don't know how it works doesn't mean that other people haven't known for a long time.

[DontMockMySmock]

I have two gripes with your video. Number one, you seem to stress "no batteries required," as if that is something special. A solar power plant doesn't require batteries to make electricity, but we don't find that particularly remarkable: its energy comes from light, just like this device. Second, you say no one knows how it works. Bullshit. Look up "thermal transpiration." Or, hell, put "Crookes radiometer" into Wikipedia, for chrissake.

[AlienRelics]

We do know why it spins - the black side absorbs energy more readily than the white side. So the black side is a little warmer. The few gas atoms in the glass are then bounced more energetically off of the black side, pushing the black side away.

That was figured out a long time ago.

[mr0champagne]

only if the glass could not stand ~ 14 psi

thats atmospheric pressure.

[pidgin]

If there was a 100% vacuum, the glass would implode.

[Drdump1]

It is possible to stick 4 pcs. of small magnet N s N s on each large vanes and help to spin a Larger Magnet motor ousite the Bulb ?? thks

[sterlingom]

Photons don't have mass, read Guitar4Ever12's explanation above. That's what causes the vanes to spin.

[ha1cu]

If there will be 100% vacuum, the vanes dont move

[fairlanejay]

Light Photons have mass.., but not much is known how, why..