Answer:
0.002833 sec
Explanation:
Speed of light in vacuum is
Given distance = 850 km = 850×1000=850000 m
We have to calculate the time that light take to travel the distance 850 km
Time
So the time taken by light to travel 850 km is 0.002833 sec
When a current flows through a metal wire, the moving charges are When a current flows through a metal wire, the moving charges
1 answer:
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The answer is the following:
"what occurs with Doppler effect are changes in frequency due to motion"
The Doppler effect occurs when the source of a wave and the observer are moving relative to each other. Due to this fact, the observer will see the wave moving at a different velocity v' with respect to the real velocity of the wave as emited by the source. As a consequence, the frequency of the wave as seen by the observer is shifted, according to the following relationship:
where:
f' is the apparent frequency, as seen by the observer
f is the real frequency
v is the velocity of the wave
vr is the velocity of the observer relative to the source of the wave (it is positive if the observer is moving towards the source, negative if he is moving away)
<span>vs is the velocity of the source relative to the observer (it is positive if the source is moving away from the observer, negative if it is moving towards him)</span>
"what occurs with Doppler effect are changes in frequency due to motion"
The Doppler effect occurs when the source of a wave and the observer are moving relative to each other. Due to this fact, the observer will see the wave moving at a different velocity v' with respect to the real velocity of the wave as emited by the source. As a consequence, the frequency of the wave as seen by the observer is shifted, according to the following relationship:
where:
f' is the apparent frequency, as seen by the observer
f is the real frequency
v is the velocity of the wave
vr is the velocity of the observer relative to the source of the wave (it is positive if the observer is moving towards the source, negative if he is moving away)
<span>vs is the velocity of the source relative to the observer (it is positive if the source is moving away from the observer, negative if it is moving towards him)</span>