Time it takes for sunlight to reach the Earth (3165)

, por F_y_Q

There are 150 000 000 km between the Sun and the Earth. If the velocity of light in vacuum is 300 000 km/s, how long light takes to reach the Earth?


SOLUCIÓN:

Clearing time in the velocity equation (being c the speed of light):

c = \frac{d}{t}\ \to\ t = \frac{d}{c}

Now is time to solve the equation:

t = \frac{1.5\cdot 10^8\ \cancel{km}}{3\cdot 10^5\frac{\cancel{km}}{s}} = \fbox{\color[RGB]{192,0,0}{\bf 500\ s}}


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