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josephpalazzo
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When a photon passes from a high gravity field to a low gravity field, it is redshifted. Therefore it has less energy. Where does that energy loss go to?
The frequency of light does not change as if moves through a gravitational field. What changes is the frequency as measured by local observers. I.e. an observer at a particular position in at a high gravitational potential will measure a frequency which is higher that an observer at a lower position will. However any particular observer will measure a constant frequency. The energy of a photon moving through a gravitational field is conserved if the field is static. Lev B. Okun published an article on this topic. It copy is located at http://arxiv.org/PS_cache/hep-ph/pdf/0010/0010120v2.pdfjosephpalazzo said:When a photon passes from a high gravity field to a low gravity field, it is redshifted. Therefore it has less energy. Where does that energy loss go to?
pmb_phy said:The frequency of light does not change as if moves through a gravitational field. What changes is the frequency as measured by local observers. I.e. an observer at a particular position in at a high gravitational potential will measure a frequency which is higher that an observer at a lower position will. However any particular observer will measure a constant frequency. The energy of a photon moving through a gravitational field is conserved if the field is static. Lev B. Okun published an article on this topic. It copy is located at http://arxiv.org/PS_cache/hep-ph/pdf/0010/0010120v2.pdf
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Pete
The observed redshift of the photon has nothing to do with the photon but is due to the relative blueshift of the absorber compared to the emitter.josephpalazzo said:When a photon passes from a high gravity field to a low gravity field, it is redshifted. Therefore it has less energy. Where does that energy loss go to?
When we turn off a light, the energy does not simply disappear. It is converted into another form, such as heat, sound, or chemical energy. The light bulb's filament, which is made of a material that resists the flow of electricity, heats up and releases energy in the form of heat and light. This is why the light bulb feels warm after being turned off.
The energy in a battery is stored in the form of chemical energy. When we use a battery, the chemical reactions inside the battery convert this energy into electrical energy, which can then power devices such as phones or flashlights. As the battery is used, the chemical energy is gradually depleted until the battery is no longer able to produce electricity.
The energy in a car's fuel is converted into mechanical energy to power the engine. When gasoline is ignited in the engine, it releases energy in the form of heat, which expands and pushes the pistons. The pistons then transfer this energy to the wheels, causing the car to move. However, not all of the energy from the fuel is converted into mechanical energy - some is lost as heat and sound.
When we use a computer, the energy from the power source is converted into electrical energy, which is then used to power the computer's components such as the CPU and memory. The energy is also converted into light energy to display images on the screen. However, not all of the energy is converted into useful work - some is lost as heat and sound, which is why computers can get warm when in use.
When we exercise, our bodies convert food into chemical energy, which is then used to power our muscles. This energy allows us to move and perform physical tasks. However, during exercise, not all of the energy is converted into useful work - some is lost as heat and sound, which is why we feel warm and may sweat during physical activity.