imagine.gsfc.nasa.gov/docs/dict_jp.html

... The physical process whereby a gamma-ray photon, usually through an interaction with the electromagnetic field of a nucleus, produces an electron and an anti-electron ( positron ). The original photon no longer exists, its energy having ...

pwg.gsfc.nasa.gov/stargaze/Sun5wave.htm

... obtained by dividing c with the wavelength: ν = c/ λ A basic quantum law then states that the energy E in joules of a photon of light of frequency ν is E = hν where h = 6.624 10 -34 joule-sec is " Planck's constant ", a universal ...

istp.gsfc.nasa.gov/stargaze/Sun5wave.htm

... obtained by dividing c with the wavelength: ν = c/ λ A basic quantum law then states that the energy E in joules of a photon of light of frequency ν is E = hν where h = 6.624 10 -34 joule-sec is " Planck's constant ", a universal ...

pwg.gsfc.nasa.gov/stargaze/Lsun5wav.htm

... omagnetic waves, at a qualitative high-school level. It then brings up the concept of photons, and the relation between photon wavelength and energy. This is tied to solar obse-rvations at various wavelengths. Part of a high school course ...

data.nasa.gov/tag/photons/

photons | data.nasa.gov an open.NASA project About data.nasa.gov Categories API Share your Data Search for: Aeronautics Catalog Climate Earth Science Engineering Institutional Life Science Operations Space Science photons Fermi Fermi is a ...

apod.nasa.gov/htmltest/rjn_bht.html

... hole at some distance. (819 k; explanation ) Approaching the photon sphere. (140 k; explanation ) Looking up at the photon sphere. (46 k; explanation ) Circling the black hole at the photon sphere. (452 k; explanation ) Still curious about ...

istp.gsfc.nasa.gov/stargaze/Lsun5wav.htm

... omagnetic waves, at a qualitative high-school level. It then brings up the concept of photons, and the relation between photon wavelength and energy. This is tied to solar obse-rvations at various wavelengths. Part of a high school course ...

apod.nasa.gov/htmltest/gifcity/bh_pub_faq.html

... will dim exponentially from that point on with a characteristic time of about 0.2 millisec-onds, and the time of the last photon is about a hundredth of a second later. The times scale proportionally to the mass of the black hole. If I jump ...

imagine.gsfc.nasa.gov/docs/dictionary.html

... and instrumental instabilities. calorimeter An instrument that measures the energy of a particle or photon through the amount of heat the particle or photon deposits in a material. cataclysmic variable (CV) Binary star systems with one ...

www.spaceplace.nasa.gov/photon-pileup/

... :: NASA's The Space Place photon-pileup Vea en Español Space Sun Earth Solar System People & Technology Parents & Educators galaxy-evolution-explorer Play Photon Pile-up! Share: Tweet Play Photon Pile-up! Did you know that ...