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Questions tagged [radiation-pressure]

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Have some publications on solar radiation pressure force applied Lambert's Cosine Law incorrectly?

I'm trying to calculate the solar radiation pressure force on a near-earth satellite. Several authoritative sources (books, journal papers) give the force on a partly specular, partly diffusive ...
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1answer
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Radiation Pressure at oblique incidence

Consider case of absorption Here the force due to light is given by $F=\frac{IA\cos\theta}{c}$ This force is perpendicular to the surface. So the pressure due to this force should be $\frac{F}{A}$, ...
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Radiation pressure at a surface which is perfectly refracting

Radiation pressure at perfectly reflecting surface = 2I/c Radiation pressure at perfectly absorbing surface = I/c What will be the radiation pressure at a perfectly refracting surface? Will it be ...
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Can light radiation pressure change its own path

Well i have seen that light creates radiation pressure Can two light waves coming from two different direction change each others path?
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Relationship between poynting vector and radiation pressure

I know that When an electromagnetic wave is absorbed or reflected by a surface, the momentum of the wave is transferred to the surface. I also know that for absorption the radiation pressure is 〈S〉/c ...
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1answer
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How are solar sails maneuvered by sunlight? Are they pushed or pulled?

On 20 May, 2010, Japan launched IKAROS probe with primary propulsion by a solar sail. If the radiation pressure, that helps the sail to move, comes from the sun, then shouldn't it be pushed away from ...
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1answer
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How will the Starshot swarm accelerate perfectly?

I was reading about the Breakthrough Initiative Starshot and I a question came to mind. From my understanding, the "mothership" will focus powerful lasers on each of the tiny ships, accelerating them ...
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2answers
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Can an atom orbit the Sun?

Is it possible for a molecule or atom to orbit a star (e.g. the Sun)? Or is there always too much outward force imparted by solar radiation compared to the inward force of gravitational attraction?
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230 views

Euler-Bernoulli equation for a cantilever strained by a force

I'm trying to model an experiment where a cantilever, fixed at one end, is oscillating under an applied force at the free end. Specifically, I'm focusing a laser on a rectangular cantilever and ...
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Can I close my door with a torch? [duplicate]

Photon pressure is definitely one of the most amazing phenomenon that I have heard in a while. Some examples: The pressure from the photons emitted by the Sun can perturb the motion of artificial ...
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3answers
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why do hypergiants shed mass before death?

I'm reading on this website here and will be using lots of quotes from it. Hypergiant Star Seen Shedding Mass Ahead Of Explosive Death As Supernova Astronomers using a telescope in Chile have ...
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1answer
654 views

Can we use radiation pressure to push/levitate a human?

I want to know, at least in theory, are there any safe em wavelength that could affect human body as net force and do no harm? To put it bluntly I want to know is it possible for levitate a human on ...
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Angular distribution of scattered photons in laser cooling

I currently prepare for a magneto-optical trap undergrad lab. Radiation pressure comes from the photon's momentum, that is clear. The emission of the photon (some time later) will give another recoil ...
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2answers
363 views

Radiation pressure applied to different color surfaces

Does the value of radiation pressure exerted by photons from sunlight vary when applied to surfaces of a different color? More specifically, ranging from pitch black to white surfaces. Also, is ...
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0answers
135 views

Why do we need to suppose the chemical potential is zero in this situation?

I've been working on some statistical mechanics problems and one of them asks to compute the pressure with chemical potential zero of a boson gas whose particles do not interact and whose energies are ...
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1answer
423 views

Can shadows affect gravity?

I was watching a video on Youtube (Vsauce, great channel, check them out), and they were talking about how much a shadow weighs, and he was talking about sails that were pushed by light. He said an ...
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How efficient is the Crookes radiometer?

I remember many years ago, I think at 8th grade, seeing the teacher show us a Crookes radiometer. I remember it being very fascinating. Today I read the wiki article on it, after looking up what it ...
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1answer
249 views

What the name of the evacuated glass gadget with black and white vanes that turn when a light is applied?

I remember a glass device my physics teacher had at high school which Contained some vanes mounted somehow on a vertical axis, which were all black on one side and white on the other Was in a vacuum ...