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  2. Gravitational time dilation - Wikipedia

    en.wikipedia.org/wiki/Gravitational_time_dilation

    Gravitational time dilation is a form of time dilation, an actual difference of elapsed time between two events, as measured by observers situated at varying distances from a gravitating mass. The lower the gravitational potential (the closer the clock is to the source of gravitation), the slower time passes, speeding up as the gravitational ...

  3. Entropy as an arrow of time - Wikipedia

    en.wikipedia.org/wiki/Entropy_as_an_arrow_of_time

    If cosmic expansion were to halt and reverse due to gravity, the temperature of the Universe would once again grow hotter, but its entropy would also continue to increase due to the continued growth of perturbations and the eventual black hole formation, [3] until the latter stages of the Big Crunch when entropy would be lower than now.

  4. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    The clock hypothesis is the assumption that the rate at which a clock is affected by time dilation does not depend on its acceleration but only on its instantaneous velocity. This is equivalent to stating that a clock moving along a path P {\displaystyle P} measures the proper time , defined by:

  5. Expansion of the universe - Wikipedia

    en.wikipedia.org/wiki/Expansion_of_the_universe

    The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. [1] It is an intrinsic expansion, so it does not mean that the universe expands "into" anything or that space exists "outside" it.

  6. Gravitational redshift - Wikipedia

    en.wikipedia.org/wiki/Gravitational_redshift

    The changing rates of clocks allowed Einstein to conclude that light waves change frequency as they move, and the frequency/energy relationship for photons allowed him to see that this was best interpreted as the effect of the gravitational field on the mass–energy of the photon.

  7. When does the time change? Here's when daylight saving time ...

    www.aol.com/does-time-change-heres-daylight...

    When does daylight saving time end? When to change clocks in fall 2024. In 2024, daylight saving time ends at 2 a.m. Sunday, Nov. 3.. Why do we gain an hour in November?

  8. Time in physics - Wikipedia

    en.wikipedia.org/wiki/Time_in_physics

    In the International System of Units (SI), the unit of time is the second (symbol: s). It has been defined since 1967 as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom", and is an SI base unit. [12]

  9. When does the time change? Here's when Daylight Saving Time ...

    www.aol.com/does-time-change-heres-daylight...

    The time change helps to maximize the amount of natural daylight. For many, it's good to wake up and feel like you got more sleep or wake up earlier than usual. Hopefully, making you feel more rested.