index of refraction
refractive index
lightspeed
light speed
c
speed of light
rapidity
light minute
SOL
light hour
high vacuum
luminous flux
subluminally
luminal
light second
special theory of relativity
kilolight
special relativity theory
special relativity
Einstein's special theory of relativity
acceleration
subvelocity
Mach number
in vacuo
flicker
deceleration
delta-v
sub-light
nonvacuum
instantaneous velocity
rest energy
microturbulence
relativistic
Planck acceleration
Planck momentum
faster-than-light
acoustooptics
intervacuum
subrelativistic
twink
candle
candela
standard candle
cd
semitransparent
muddy
flash
light year
Sears-Haack body
nonrelativistic mechanics