Description:
This waveform (GW150914) is that of the first observation of gravitational waves on 2015-09-14. It was also the first observation of a binary black hole merger and demonstrates the existence of binary stellar-mass black hole systems.
Tags:
physics professor, physics teacher, science, black hole, gw150914
Description:
The Doppler Effect or Doppler shift is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.
Description:
The Doppler Effect or Doppler shift is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.
Tags:
science, observer, christian doppler, sound, doppler
