(physics) travelling wave (wave that is not bounded by a given space, but can propagate freely)

the speed of light

a surname

make progress

near, close to (in space) / near (in time), at hand / close, closely related / near, not far off (in amount) / similar in appearance, form, color, shape, etc. / close, on good terms with

near, close

an advance; progress

speed; velocity / (physics) velocity

a wave

a female given name