I have one question - According to Relativity, nothing can travel at the speed of light but also according to relativity, all motion is relative. So, is it true that with respect to light we are travelling at the speed of light in the opposite direction?
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Here goes my answer, "Speed of light is constant irrespective of the relative speed of the observer. So does this mean irrespective of the speed of an object/observer as well as speed of the light itself too? In case of relative speed of an object/observer its relative speed cannot be the same speed of light within a gravitationally bound galaxy; else it would convert into energy instead of remaining as an object. Relative speed of light with respect to another light cannot be double or greater than the maximum speed of light, if one light travels at the speed of light then the other light necessarily needs to be constant!? Is there any relationship between C and C? :)
However, to your question, a relative speed does not mean in opposite direction to light because light does not travel in one direction but travels throughout the space. So no object in relative speed to light can travel in opposite direction to light. Therefore nothing does travel at the speed of light in opposite direction to light within a galaxy.
Light is known to be the highest possible speed in consideration and its speed is constant with respect to, and irrespective of, the speed of an observer/object. So it is improper to make light (travelling in such a highest possible speed), as reference frame to determine the speed of an observer/object, beside such an object/observer may be at rest or in motion/speed relative to some other frame of reference and certainly not only related to light in question, so this fact nullifies the acceptability to make light as the absolute frame of reference in the phenomenon in question.
Therefore, you cannot travel with respect to light, (making light as reference frame) you can only lag behind a speeding light . To answer the question more exactly, yes... to an observer that is at rest relative to the light beam the object they are observing would be travelling at the speed of light but in the 'opposite' direction.
hope it helped you
However, to your question, a relative speed does not mean in opposite direction to light because light does not travel in one direction but travels throughout the space. So no object in relative speed to light can travel in opposite direction to light. Therefore nothing does travel at the speed of light in opposite direction to light within a galaxy.
Light is known to be the highest possible speed in consideration and its speed is constant with respect to, and irrespective of, the speed of an observer/object. So it is improper to make light (travelling in such a highest possible speed), as reference frame to determine the speed of an observer/object, beside such an object/observer may be at rest or in motion/speed relative to some other frame of reference and certainly not only related to light in question, so this fact nullifies the acceptability to make light as the absolute frame of reference in the phenomenon in question.
Therefore, you cannot travel with respect to light, (making light as reference frame) you can only lag behind a speeding light . To answer the question more exactly, yes... to an observer that is at rest relative to the light beam the object they are observing would be travelling at the speed of light but in the 'opposite' direction.
hope it helped you
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