Speed of light dimensions of a capacitor, whereas the value of the vacuum permeability is fixed at exactly through the definition of the ampere. Rosa and Dorsey used this method in 1907 to find a value of . Another way to measure the speed of light is to independently measure the frequency "f" and wavelength "λ" of an electromagnetic wave in vacuum. The value of "c" can then be found by using the relation "c" = "fλ". One option is to measure the resonance frequency of a cavity resonator. If the dimensions of the resonance cavity are also known, these can be used
Speed of Light (Speed song) Speed of Light (Speed song) "Speed Of Light" is the second single by South Korea boy group Speed. The single album by promotional singles "슬플약속 (That's My Fault)". In December 9, 2012, Core Contents Media released the first teaser photo for "It's Over" for their debut album Superior Speed. Before the release of the debut album, Speed's they released single album "Speed of Light" the title is 슬플약속 (That's My Fault) feat. Davichi's Kang Minkyung. Two music videos were released for the song "슬플약속 (That's My Fault)" featuring Davichi's Kang Minkyung; a dance version and a drama version featuring Park