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May 16, 18 · Gravitational energy is the potential energy associated with gravitational force, as work is required to elevate objects against Earth's gravity The potential energy due to elevated positions is called gravitational potential energy, and is evidenced by water in an elevated reservoir or kept behind a dam If an object falls from one point toJun 19,  · Looking for Dark Matter with Gravitational Waves June 19, • Physics 13, 100 Physicists are building a prototype tabletop detector to capture gravitational waves at higher frequencies than LIGO can and to possibly spot waves from annihilating axions Asimina Arvanitaki/Stanford University If axions exist, huge numbers of them wouldMay 03, 15 · The kinetic energy of a photon is hf, where f is the photon's frequency If a photon is fired straight up from the surface of a planet it is said to "lose energy" to "the (gravitational) field" The loss of energy is visible to an observer overhead as a lower freq