Questions tagged [radiation-pressure]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1 vote
1 answer
94 views

Understanding radiation pressure

I've been told that the radiation pressure of light can be understood(?) by considering a charged particle as a damped driven harmonic oscillator where the forcing term is the electromagnetic field, ...
user avatar
0 votes
0 answers
39 views

Radiation pressure and specific intensity

In the book Radiative Processes jn Astrophysics (Rybicki, Lightman) a macroscopic radiation theory is described using specific intensity $I_{\nu}$. Then, the following definition for momentum flux is ...
user avatar
1 vote
1 answer
52 views

Does the Parker Solar Probe experience radiation pressure being so close to the sun?

Since the Parker Solar Probe does close fly-bys around the sun, does it experience any significant radiation pressure from photons emitted by the sun? Is this push, significant enough to require ...
user avatar
  • 523
0 votes
1 answer
84 views

Confusion in calculating radiation pressure

As mentioned here in wikipedia the net radiation pressure on a perfect reflective surface is $ {2I \over c}$ where $I$ is irradiance and $c$ is the speed of light In case of a perfect blackbody $I = ...
user avatar
0 votes
2 answers
32 views

Equillibrium Position of Partition

Suppose You have a cylinder with its surface insulated and there is a partition that is free to move. You put a photon gas on both sides of a partition, and You have managed to make the temperature of ...
user avatar
2 votes
3 answers
52 views

If all objects emit IR radiation, would it be sufficient to place an IR mirror behind an object to propel it forward?

I'm assuming objects don't move all the time because they emit IR radiation in all directions. If we have an IR mirror behind the object to focus their direction, would this propel the object forward?
user avatar
1 vote
1 answer
92 views

Calculating pressure and flux tensors in radiative astrophysics

I need to calculate the components of the radiative flux tensor and the pressure tensor, but I am having a little trouble figuring out what the integral should be. The flux is defined as $$F_v = 4{\pi}...
user avatar
0 votes
2 answers
59 views

Is radiation pressure a doppler effect?

I came to this conclusion for the following reasons (thanks to the people who answered my recent questions): A photon pushing a mirror(*) loses energy in the form of a red shift (*through radiation ...
user avatar
  • 3,179
1 vote
2 answers
86 views

Can a photon increase its frequency by bouncing against a mirror moving toward it?

As discussed in preceding questions, photons can lower their frequency after a reflection happens and radiation pressure sets the mirror in motion. I wonder if the opposite can happen, i.e. increasing ...
user avatar
  • 3,179
0 votes
3 answers
192 views

Is there a way to convert directly most electromagnetic radiation to kinetic energy?

Parent questions: Do photons lose energy after radiation pressure is applied to a perfect reflector? Since radiation loses energy to radiation pressure in a reflection, can the entire energy of a ...
user avatar
  • 3,179
0 votes
3 answers
79 views

Since radiation loses energy to radiation pressure in a reflection, can the entire energy of a radiation be consumed through multiple reflections?

Parent question here: Do photons lose energy after radiation pressure is applied to a perfect reflector? So I have been told that radiation pressure that sets a mirror in motion (e.g. in outer space) ...
user avatar
  • 3,179
1 vote
3 answers
185 views

Do photons lose energy after radiation pressure is applied to a perfect reflector?

I was readng Wikipedia article (English one) about radiation pressure because there is something I still cannot figure out. As I understand it, radiation pressure emerges from conservation of momentum....
user avatar
  • 3,179
2 votes
1 answer
58 views

Optomechanical interaction

In cavity optomechanics, we see that if one of the mirrors is oscillatory and the other one is fixed,the photons are not able to shift the oscillating mirror continuously in one direction no matter ...
user avatar
1 vote
1 answer
67 views

How to calculate the radiation pressure on a moving surface?

How do I find the radiation pressure exerted on a perfectly reflective flat surface that is moving along the normal of the mirror?
user avatar
  • 107
1 vote
1 answer
95 views

Cumulative Sun's radiation pressure exerts on Earth's surface

I have some discrepancies in what is in "Optics" (E. Hecht) and what I calculated, but it's simply formula, so I'm confused. I used: $$F = \frac{\pi R^2 S}{c}$$ to calculate cumulative force of ...
user avatar
  • 33
3 votes
3 answers
101 views

Conceptual Issue With Radiation Pressure [closed]

Consider a flat, thin, perfectly reflective square mirror of mass $m$ lying on edge on a frictionless, horizontal surface that is met by an electromagnetic wave with Poynting vector parallel to the ...
user avatar
0 votes
1 answer
38 views

Motion of air particles across ultrasound waves

I wanted to know if air particles can cross through (transverse direction) an ultrasound wave or they will start to oscillate in the direction of wave propagation (longitudinal) when they get in ...
user avatar
0 votes
1 answer
110 views

What are all the types of radiation emitting from the Earth or an arbitrary mass in space?

I'm interested in what forces collectively act upon a body in space (obviously radially, so they usually cancel) due to pressures caused by emitted radiation (of any type, strength, "size"). Can you ...
user avatar
2 votes
4 answers
198 views

Can radiation pressure do work, if so does the magnetic field participate?

I understand that the magnetic field cannot do work because the Lorentz force is always perpendicular to the displacement. In my optics book(Hecht Ch3) these equations appear: Electromagnetic ...
user avatar
  • 23
0 votes
0 answers
39 views

Acoustic Plane Wave

Consider an ideal fluid which we have a spherical object on it and a progressive plane wave is heading the object. I have a simple question and it is: If we assume the amplitude of the incident ...
user avatar
0 votes
0 answers
61 views

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 ...
user avatar
1 vote
1 answer
1k views

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 $\frac{F}{A}$, ...
user avatar
0 votes
0 answers
34 views

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 ...
user avatar
2 votes
4 answers
91 views

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?
user avatar
3 votes
1 answer
63 views

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 ...
user avatar
  • 35
0 votes
1 answer
45 views

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 ...
user avatar
  • 197
78 votes
2 answers
10k views

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?
user avatar
0 votes
1 answer
808 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 ...
user avatar
1 vote
0 answers
65 views

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 ...
user avatar
2 votes
3 answers
277 views

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 ...
user avatar
  • 825
3 votes
1 answer
835 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 ...
user avatar
  • 860
2 votes
0 answers
50 views

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 ...
user avatar
0 votes
2 answers
859 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 ...
user avatar
1 vote
1 answer
704 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 ...
user avatar
8 votes
0 answers
459 views

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 ...
user avatar
  • 339
3 votes
1 answer
254 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 ...
user avatar