Can frequency of light be changed?

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SUMMARY

The discussion confirms that the frequency of light can be changed through the Doppler effect, specifically when a light source moves relative to an observer, resulting in a blue shift. It emphasizes that while the wavelength of light changes, the speed of light remains constant at c. The conversation also touches on the conservation of energy, stating that energy can only be transformed and not created or destroyed, which limits the potential for harnessing energy from cohesive and adhesive forces without increasing system entropy.

PREREQUISITES
  • Understanding of the Doppler effect in physics
  • Familiarity with the principles of energy conservation
  • Knowledge of cohesive and adhesive forces in materials science
  • Basic concepts of entropy in thermodynamics
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  • Research the Doppler effect and its applications in astrophysics
  • Explore the principles of energy conservation in closed systems
  • Study cohesive and adhesive forces in the context of material properties
  • Investigate the implications of entropy in thermodynamic processes
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Physicists, materials scientists, and anyone interested in the principles of energy transformation and the behavior of light in different contexts.

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can cohesive and adhesive forces be used to generate energy?
If yes then how if no then why?
 
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Yes (wavelength changes), the speed, however, remains constant. If say you were traveling in a vessel going c/2 and began emitting a ray of light the light would have it's frequency changed or blue shifted. This is because energy is conserved throughout the universe and since the photon cannot exceed the speed of light, it's wavelength changes, resulting in a higher frequency (Doppler effect).

to Your second question, yes but only if energy is applied to the system. Again, energy is conserved in both its "stored" state (matter) and "active" state (energy, electromagnetic radiation) and can neither be created or destroyed. So if energy was stored as potential kinetic energy in the cohesive and adhesive forces then maybe. but at that attempting to harness this energy would serve to decrease the entropy of the system an therefore halt whatever liquid from spanning more of the universe. so in all entirety no.
 
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