Re: Speed of light
The metre is no longer defined as a number of wavelengths of emission lines (twas krypton, BTW). Since the 80's it's been defined as the distance travelled by light in a vacuum in 1/299792458 of a second, effectively fixing c.
The metre is no longer defined as a number of wavelengths of emission lines (twas krypton, BTW). Since the 80's it's been defined as the distance travelled by light in a vacuum in 1/299792458 of a second, effectively fixing c.