من سرچ زیاد کردم نتیجه نداد، اما احساس میکنم علت اینکه پرتو های نور واگرا میشن اینه که ما نمیتونیم پرتو های نور رو به شکل دقیقا موازی گسیل کنیم
مثلا چراغ قوه خودش از اول پرتو های نور رو به شکل واگرا گسیل میکنه
اما لیزر پرتو هارو به شکل همگرا گسیل میکنه و میدونیم پرتو های همگرا بعد از مدتی بهم میرسن و از هم رد میشن و بعدم واگرا میشن.اگه روزی روزگاری شد که دقیقا بتونیم یک پرتو نور گسیل کنیم .. احتمالا اون دیگه تو فضا گسترده نمیشه مگه اینکه چه میدونم یه بلایی مثل قطبشی چیزی سرش بیاد!
گرانش فوتون
Re: گرانش فوتون
اگه اندازه واگرا شدن باریکه لیزر قرمز با لیزر ابی فرق داشته باشه ایا با موضوع فضا زمان قابل توضیح هست
Re: گرانش فوتون
دوستان برای اینکه خیالتون از جرم فوتون و اینا راحت شه
Current commonly accepted physical theories imply or assume the photon to be strictly massless. If the photon is not a strictly massless particle, it would not move at the exact speed of light, c in vacuum. Its speed would be lower and depend on its frequency. Relativity would be unaffected by this; the so-called speed of light, c, would then not be the actual speed at which light moves, but a constant of nature which is the maximum speed that any object could theoretically attain in space-time.[23] Thus, it would still be the speed of space-time ripples (gravitational waves and gravitons), but it would not be the speed of photons.
If a photon did have non-zero mass, there would be other effects as well. Coulomb's law would be modified and the electromagnetic field would have an extra physical degree of freedom. These effects yield more sensitive experimental probes of the photon mass than the frequency dependence of the speed of light. If Coulomb's law is not exactly valid, then that would allow the presence of an electric field to exist within a hollow conductor when it is subjected to an external electric field. This thus allows one to test Coulomb's law to very high precision.[24] A null result of such an experiment has set a limit of m ≲ 10−14 eV/c2.[25]
Sharper upper limits on the speed of light have been obtained in experiments designed to detect effects caused by the galactic vector potential. Although the galactic vector potential is very large because the galactic magnetic field exists on very great length scales, only the magnetic field would be observable if the photon is massless. In the case that the photon has mass, the mass term \scriptstyle\frac{1}{2} m^2 A_{\mu}A^{\mu} would affect the galactic plasma. The fact that no such effects are seen implies an upper bound on the photon mass of m < 3×10−27 eV/c2.[26] The galactic vector potential can also be probed directly by measuring the torque exerted on a magnetized ring.[27] Such methods were used to obtain the sharper upper limit of 10−18eV/c2 (the equivalent of 1.07×10−27 atomic mass units) given by the Particle Data Group.[28]
These sharp limits from the non-observation of the effects caused by the galactic vector potential have been shown to be model dependent.[29] If the photon mass is generated via the Higgs mechanism then the upper limit of m≲10−14 eV/c2 from the test of Coulomb's law is valid.
به نقل از
https://en.wikipedia.org/wiki/Photon
کلی هم براش رفرنس گذاشته، دیگه این موثقه
Current commonly accepted physical theories imply or assume the photon to be strictly massless. If the photon is not a strictly massless particle, it would not move at the exact speed of light, c in vacuum. Its speed would be lower and depend on its frequency. Relativity would be unaffected by this; the so-called speed of light, c, would then not be the actual speed at which light moves, but a constant of nature which is the maximum speed that any object could theoretically attain in space-time.[23] Thus, it would still be the speed of space-time ripples (gravitational waves and gravitons), but it would not be the speed of photons.
If a photon did have non-zero mass, there would be other effects as well. Coulomb's law would be modified and the electromagnetic field would have an extra physical degree of freedom. These effects yield more sensitive experimental probes of the photon mass than the frequency dependence of the speed of light. If Coulomb's law is not exactly valid, then that would allow the presence of an electric field to exist within a hollow conductor when it is subjected to an external electric field. This thus allows one to test Coulomb's law to very high precision.[24] A null result of such an experiment has set a limit of m ≲ 10−14 eV/c2.[25]
Sharper upper limits on the speed of light have been obtained in experiments designed to detect effects caused by the galactic vector potential. Although the galactic vector potential is very large because the galactic magnetic field exists on very great length scales, only the magnetic field would be observable if the photon is massless. In the case that the photon has mass, the mass term \scriptstyle\frac{1}{2} m^2 A_{\mu}A^{\mu} would affect the galactic plasma. The fact that no such effects are seen implies an upper bound on the photon mass of m < 3×10−27 eV/c2.[26] The galactic vector potential can also be probed directly by measuring the torque exerted on a magnetized ring.[27] Such methods were used to obtain the sharper upper limit of 10−18eV/c2 (the equivalent of 1.07×10−27 atomic mass units) given by the Particle Data Group.[28]
These sharp limits from the non-observation of the effects caused by the galactic vector potential have been shown to be model dependent.[29] If the photon mass is generated via the Higgs mechanism then the upper limit of m≲10−14 eV/c2 from the test of Coulomb's law is valid.
به نقل از
https://en.wikipedia.org/wiki/Photon
کلی هم براش رفرنس گذاشته، دیگه این موثقه
Re: گرانش فوتون
در بحث Ray Optic که یک بحث تقریبی هست پرتوهای موازی واگرا نمیشن.
اما در بحث Wave Optic حتی پرتوهای موازی هم واگرا میشن و این ناشی از اصول کوانتوم مکانیک باید باشه.
اما در بحث Wave Optic حتی پرتوهای موازی هم واگرا میشن و این ناشی از اصول کوانتوم مکانیک باید باشه.
˙ ·٠•♥ السلام علی بقیه الله فی ارضه ♥•٠·˙