Assertion: c | /r/HasProperty | the speed
Facets:
value: in a vacuum
type: LOCATION
value: in n
type: LOCATION
Source sentences:
text: One consequence is that c is the speed at which all massless particles and waves, including light, must travel in vacuum.
text: So, for your fused quartz, c = Cn, where C is the speed in a vacuum and n is the refraction index, which you need to look up.