In the year 1178 five monks


Asked by maham237 @ in Physics viewed by 275 People


In the year 1178, five monks at Canterbury Cathedral in England observed what appeared to be an asteroid colliding with the moon, causing a red glow in and around it. It is hypothesized that this event created the crater Giordano Bruno, which is right on the edge of the area we can usually see from Earth. How long after the asteroid hit the Moon, which is 3.84 x 105 km away, would the light first arrive on Earth in seconds?

Answered by maham237 @



To solve this problem it is necessary to apply the kinematic equations of description of the movement in which it is understood that the velocity is the travel of a particle in a fraction of time, that is to say

v = \frac{x}{t}

Where,

x = Displacement

t = time

In our case the speed is equivalent to that of the Light, and the distance is necessary to reach the moon by the asteroid.

v = 3.8*10^8m/s

x = 3.84*10^5km = 3.84*10^8m

Re-arrange to find t,

t = \frac{x}{V}

t = \frac{3.84*10^8}{3.8*10^8}

t = 1.28s

Therefore will take 1.28 s for the light arrive on Earth.


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