Is there a Crookes radiometer device with photoelectric effect?

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jonjacson
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I am looking for a device similar to a Crookes radiometer but using the photoelectric effect.
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Probably nor.
Do you understand why a radiometer turns in the directgion it does?, (White side forward) That's our starting point.
 

FAQ: Is there a Crookes radiometer device with photoelectric effect?

What is a Crookes radiometer?

A Crookes radiometer, also known as a light mill, is a device that consists of an airtight glass bulb containing a partial vacuum. Inside the bulb, there is a rotor with several (usually four) vanes which are mounted on a spindle. The vanes are black on one side and white or silver on the other. When exposed to light, the vanes spin, with the black sides retreating from the light source and the white sides advancing.

How does a Crookes radiometer work?

The operation of a Crookes radiometer is primarily based on thermal transpiration rather than the photoelectric effect. When light hits the black side of the vanes, it heats up more than the white side. The heated air molecules near the black surface move faster and exert more pressure, causing the vanes to spin. This is due to the difference in temperature and pressure between the two sides of the vanes.

What is the photoelectric effect?

The photoelectric effect is the emission of electrons from a material when it is exposed to light (usually ultraviolet or higher frequency). This phenomenon occurs because photons in the light transfer their energy to electrons in the material, allowing them to escape from the surface. The photoelectric effect is a quantum mechanical process and was explained by Albert Einstein, which earned him the Nobel Prize in Physics in 1921.

Can a Crookes radiometer utilize the photoelectric effect to operate?

No, a Crookes radiometer does not utilize the photoelectric effect to operate. The spinning of the vanes in a Crookes radiometer is due to thermal transpiration, where the differential heating of the black and white surfaces causes a pressure difference in the air molecules. The photoelectric effect involves the emission of electrons and is not responsible for the movement of the vanes in the radiometer.

Is there a device that combines the principles of a Crookes radiometer and the photoelectric effect?

As of now, there is no widely known device that combines the principles of a Crookes radiometer and the photoelectric effect. The two phenomena operate on different principles: thermal transpiration for the radiometer and electron emission for the photoelectric effect. Any hypothetical device combining these would need to address both the mechanical motion from thermal effects and electron emission from light exposure, which are fundamentally different processes.

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