imanismith2002
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A laser beam from Earth is reflected back from a mirror on the Moon in 2.60 s. If the distance between Earth and the Moon is 3.85 × 108 m, calculate the speed of light.

Please show work.

Respuesta :

AL2006

Speed = (distance covered) / (time to cover the distance)

The laser beam has to come back after it hits the mirror on the moon.  So the total distance it covers is double the distance between the Earth and Moon.

2 x (3.85 x 10⁸m) = 7.70 x 10⁸ m

Speed = (7.70 x 10⁸ m) / (2.60 s)

Speed = (7.70 / 2.60) (m/s)

Speed = 2.96 x 10⁸ m/s

If a laser beam from the Earth is reflected in 2.6 s in a mirror on the moon , the speed of light from it will be 2.96 x 10⁸ m/s.

What is laser beam?

Laser beam is the an intense beam of light produced by the laser.

A laser beam from Earth is reflected back from a mirror on the Moon, the distance, covered is double the distance between the Earth and Moon.

2 x (3.85 x 10⁸m) = 7.70 x 10⁸ m

The time taken to cover this distance is in 2.60 s. If the distance between Earth and the Moon is 3.85 × 10⁸ m.

The speed v is the distance covered d in unit time t.

v = d /t

v = (7.70 x 10⁸ m) / (2.60 s)

v = 2.96 x 10⁸ m/s

Therefore, the speed of light is  2.96 x 10⁸ m/s

Learn more about laser beam.

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