11–19 of 19 posts
Earlier quoted context omitted.
A reflected photon imparts twice its momentum.
Momentum was the wrong word, but it feels like layers of diffraction could red shift the light more, absorbing more energy out of each photon.
To move, you want to absorb momentum, not energy.
Earlier quoted context omitted.
A reflected photon imparts twice its momentum.
Momentum was the wrong word, but it feels like layers of diffraction could red shift the light more, absorbing more energy out of each photon.
I'm always caught off guard whenever I see Rochester Institute of Technology (RIT) or the City of Rochester in general mentioned anywhere. I just don't expect it. I know Rochester is a former U.S. Boomtown and has a major historical presence in the U.S. but with the great leaps other cities made in Rochester's decline I don't jump to the idea of seeing Rochester mentioned unless it is about lasers. That being said, R…
https://newyorkphotonics.org/2019/12/04/kodaks-enduring-lega...
Earlier quoted context omitted.
Momentum was the wrong word, but it feels like layers of diffraction could red shift the light more, absorbing more energy out of each photon.
… which just heats up the sail. To move , you want to absorb momentum, not energy.
Stupid question, where does the energy comes from? With reflection, I see how you can harvest energy through red-shift (the reflected photon ends up with a lower frequency after it bounces due to Doppler effect, which means it lost energy and gave it to the sail as kinetic energy), but here I don't really understand were the energy comes from.
Earlier quoted context omitted.
Momentum was the wrong word, but it feels like layers of diffraction could red shift the light more, absorbing more energy out of each photon.
The light reflected from a mirror is already red-shifted due to the velocity of the mirror.
Earlier quoted context omitted.
Momentum was the wrong word, but it feels like layers of diffraction could red shift the light more, absorbing more energy out of each photon.
… which just heats up the sail. To move , you want to absorb momentum, not energy.
Earlier quoted context omitted.
… which just heats up the sail. To move , you want to absorb momentum, not energy.
At the scale of individual particles, heat is movement.
Reflection means solar sail goes in direction you want to go.
I'm always caught off guard whenever I see Rochester Institute of Technology (RIT) or the City of Rochester in general mentioned anywhere. I just don't expect it. I know Rochester is a former U.S. Boomtown and has a major historical presence in the U.S. but with the great leaps other cities made in Rochester's decline I don't jump to the idea of seeing Rochester mentioned unless it is about lasers. That being said, R…