Link to Article: Aliens Might Shoot Lasers at Black Holes to Travel the Galaxy
This journalist has made a glaring error in stating a basic scientific principle, to wit:
Rafi Letzter wrote:
Boomerang photons already move at the speed of light, so they don't pick up any speed from their trips around black holes. But they do pick up energy. That energy takes the form of increased wavelength of the light, and the individual photon "packets" carry more energy than they had when they entered the mirror.
No, Rafi. Increasing a photon's energy DECREASES its wavelength in accordance with the formula:
Wavelength = (h x c) / EWhere 'h' is Planke's constant, 'c' is the speed of light in a vacuum, and 'E' is the photon's energy.
Photon energy is the energy carried by a single photon.
The amount of energy is directly proportional to the photon's electromagnetic frequency and
inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy. Equivalently,
the longer the photon's wavelength, the lower its energy.
Journalists … please stick to reporting, and leave the science to the scientists!