我又接着问Hafele-Keating时钟实验中,是否时钟就是时间?
The Hafele-Keating experiment used the clock to indicate the time, however
the time is not a clock. Do the physics believe the clock change means time
changed?
回答如下(即:物理学家认为“时钟读数”就是时间):
According to the search results, time in physics is operationally defined
as "what a clock reads". The physical nature of time is addressed by general
relativity with respect to events in spacetime. Examples of events are the
collision of two particles, the explosion of a supernova, or the arrival
of a rocket ship□ Time can be considered to be the fourth dimension of
reality, used to describe events in three-dimensional space□ It is not
something we can see, touch, or taste, but we can measure its passage□
The Hafele-Keating experiment used atomic clocks to measure the time difference
between different inertial frames. Atomic clocks are very precise devices
that use the frequency of electromagnetic radiation emitted by atoms to
keep track of time. The frequency of these atoms is constant and independent
of their motion or position. However, according to relativity, the rate at
which time passes depends on the motion and position of the observer. Therefore,
two atomic clocks that are moving at different speeds or altitudes will
measure different amounts of time for the same event. This does not mean
that the clocks are changing, but rather that time itself is changing4.
The physics believe that the clock change means time changed because they
use clocks as a standard to measure time. If two clocks that are synchronized
at the same location show different readings after they have moved to different
locations, then it means that time has passed differently for them due to
relativity.
The Hafele-Keating experiment used the clock to indicate the time, however
the time is not a clock. Do the physics believe the clock change means time
changed?
回答如下(即:物理学家认为“时钟读数”就是时间):
According to the search results, time in physics is operationally defined
as "what a clock reads". The physical nature of time is addressed by general
relativity with respect to events in spacetime. Examples of events are the
collision of two particles, the explosion of a supernova, or the arrival
of a rocket ship□ Time can be considered to be the fourth dimension of
reality, used to describe events in three-dimensional space□ It is not
something we can see, touch, or taste, but we can measure its passage□
The Hafele-Keating experiment used atomic clocks to measure the time difference
between different inertial frames. Atomic clocks are very precise devices
that use the frequency of electromagnetic radiation emitted by atoms to
keep track of time. The frequency of these atoms is constant and independent
of their motion or position. However, according to relativity, the rate at
which time passes depends on the motion and position of the observer. Therefore,
two atomic clocks that are moving at different speeds or altitudes will
measure different amounts of time for the same event. This does not mean
that the clocks are changing, but rather that time itself is changing4.
The physics believe that the clock change means time changed because they
use clocks as a standard to measure time. If two clocks that are synchronized
at the same location show different readings after they have moved to different
locations, then it means that time has passed differently for them due to
relativity.