the most accurate standard for the metre is conveniently defined so that there are exactly 299,792,458 of them to the distance travelled by light in a standard second, giving a value for the metre that very accurately matches the now inadequately precise standard metre rule in Paris Proceedings of the Royal Society of London
"Severe limits on variations of the speed of light with frequency" "Probing the Speed of Light with Radio Waves at Extremely Low Frequencies"

ناسا بالعربي

"Nicole Oresme on the Nature, Reflection, and Speed of Light".

12
سرعة الضوء في الفراغ
"The Ratio of the Electromagnetic and Electrostatic Units"
حقيقة البعد الرابع في الطبيعة
"Review: Hakim Mohammed Said, Ibn al-Haitham"
قيمة سرعة الضوء في الفراغ تساوي
— Nature 19 November 2009
Essen, L; Gordon-Smith, AC 1948 "The Velocity of Propagation of Electromagnetic Waves Derived from the Resonant Frequencies of a Cylindrical Cavity Resonator"
72 3 : 357—374 [367—74] Ellis, J; Mavromatos, NE; Nanopoulos, DV; Sakharov, AS 2003

حساب سرعة الضوء في الفراغ

Rosa, EB; Dorsey, NE 1907.

28
سرعة الضوء في الفراغ
"Photon Mass Bound Destroyed by Vortices"
سرعة الضوء
Panofsky, W; Phillips, M 1962
سرعة الضوء في الماء
"Chapter Five — The Scholar of Cairo"
Uzan, J-P; Leclercq, B 2008 "Quantum-Gravity Analysis of Gamma-Ray Bursts using Wavelets"
"Measurement of the Velocity of Light Between Mount Wilson and Mount San Antonio" "The Velocity of Propagation of Electromagnetic Waves Derived from the Resonant Frequencies of a Cylindrical Cavity Resonator"

سرعة الضوء في الماء: هل تختلف عن سرعته في وسط آخر؟

.

سرعة الضوء في الفراغ مقسومة على سرعة الضوء في الوسط
Series A, Mathematical and Physical Sciences,
سرعة الضوء في الماء
"Astrophysics: Burst of support for relativity"
سرعة الضوء في الفراغ مقسومة على سرعة الضوء في الوسط
Visual Communication: Images With Messages