I Is there a Crookes radiometer device with photoelectric effect?

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The Crookes radiometer operates based on the differential heating of its black and white sides, causing it to rotate with the white side facing the light source. The discussion explores whether incorporating materials that exhibit the photoelectric effect would enhance the rotation speed. However, it is suggested that using different materials may not significantly impact the radiometer's performance. Understanding the fundamental mechanics of the radiometer is essential for evaluating any modifications. The conversation emphasizes the importance of the existing principles governing the device's operation.
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.
 

Thread 'Angular Momentum Vector and Its Magnitude'

For the quantum state ##|l,m\rangle= |2,0\rangle## the z-component of angular momentum is zero and ##|L^2|=6 \hbar^2##. According to uncertainty it is impossible to determine the values of ##L_x, L_y, L_z## simultaneously. However, we know that ##L_x## and ## L_y##, like ##L_z##, get the values ##(-2,-1,0,1,2) \hbar##. In other words, for the state ##|2,0\rangle## we have ##\vec{L}=(L_x, L_y,0)## with ##L_x## and ## L_y## one of the values ##(-2,-1,0,1,2) \hbar##. But none of these...
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