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How do you explain the relative motion between the equatorial coordinate system and the horizontal coordinate system as time passes for an observer upon the earth?
Wiki User
∙ 9y ago
The equatorial coordinate system is usually called geocentric coordinates, which are declination and hour-angle, and the horizontal system is called altitude and azimuth.
The two coordinate systems are tilted relative to one another by 23.4 degrees, the Earth's axial tilt, in the plane of the local meridian of the observer.
As time passes, in geocentric coordinates the declination stays the same while the hour angle increases at 15 degrees per hour. In the horizontal system both coordinates change, with the altitude increasing from zero as an object rises, then reaches its maximum altitude when due south, and then it gradually sets in the west.
Wiki User
∙ 9y ago
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How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?
The frequencies are the same, unless the source is moving relative to the observer.
What is the redshift star?
The redshift is caused by relative motion that increases the distance from the source to the observer. The faster the source of light is moving away to the observer, the greater the redshift
Is it possible to move a source of sound relative to a stationary observer so that there is no shift in the frequency of the sound?
For the sound from a source not to be shift in frequency , the radial velocity of the source to the observer must be zero : that is the source must not be moving towards or away from the observer
Can a body posses two velocities at a specific time?
For different observers (moving at different velocities), the object will have different velocities (relative to the corresponding observer). For one and the same observer, the body will have only one velocity at any given time.
Is it true or false the second postulate of special relativity says that the speed of light in empty space depends on the motion of the source or of the observer?
False. The speed of light in empty space is a constant, independent of the motion of the source/observer. An observer travelling towards or away from a light source at 99% the speed of light would measure light going the same speed as an observer stationary relative to the light source.
Motion relative to observers frame of?
Motion is relative to an observer's frame of Reference.
An object is in motion if it changes position relative t a?
Observer.
If time is relative to the observer then is the future and past happening right now?
If time is relative to the observer, then "right now" has no meaning. We originally meant that as a facetious response, but that fact is actually the real basis for the whole concept of Relativity ... that "simultaneous" depends on the observer.
How does the relative motion of a motorcycle affect the frequency of the sound heard by an observer on the sidewak?
as the motorcycle approaches the observer, the frequency increases.
What is a moving frame?
A frame of reference, in physics, is a particular choice of coordinate systems. Part of what Einstein's theory of relativity is about is that there's no such thing as a "preferred frame" ... one that is somehow "better" than any other. We're therefore free to choose our coordinate system in any way that makes the mathematics convenient for our calculations.A moving frame is one that's in motion relative to something else ... and since pretty much everything is moving relative to something else, we usually use the term when we're temporarily pretending that there's some "absolute" coordinate system, and we want to describe a frame of reference that's moving relative to that coordinate system. For example, we might use it to describe the frame of reference of people in a spaceship relative to a "static" frame of an observer on a planet.
How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?
The frequencies are the same, unless the source is moving relative to the observer.
What is the redshift star?
The redshift is caused by relative motion that increases the distance from the source to the observer. The faster the source of light is moving away to the observer, the greater the redshift
Is it possible to move a source of sound relative to a stationary observer so that there is no shift in the frequency of the sound?
For the sound from a source not to be shift in frequency , the radial velocity of the source to the observer must be zero : that is the source must not be moving towards or away from the observer
Does the Doppler Effect occur when both the source and observer are moving at the same velocity?
No. There has to be a relative velocity.
Is earths surface in constant motion?
Yes, relative to any observer not attached to the earth's surface.
Does time slow down in space?
Time is relative to the speed of the observer and the faster an observer travels at the slower time will appear for him. So time slows down with speed not with distance.
What is the horizontal component of a vector whose magnitude is 70 and whose direction relative to the horizontal is 20?
A vector with magnitude = 70 , directed 20° above or below horizontal,has a horizontal component of70 cos(20°) = 65.778 (rounded)
