Kepler-186f is an exoplanet that orbits a star other than the Sun. Its star is the red dwarf Kepler-186. It is the first planet to be discovered that orbits its star at a distance like Earth’s distance from the Sun. If Kepler-186f is approximately 5.4 x 1010 meters from Kepler-186, how long does it take for light from the star to reach the exoplanet? The speed of light is 3.0 x 108 m/s. It takes 3 minutes

t = 180 s = 3 minutes

Explanation:

The formula for the uniform speed of any object or element is given as:

V = S/t

t = S/V

where,

S = Distance between star and exoplanet = 5.4 x 10¹⁰ m

V = Speed of the light = 3 x 10⁸ m/s

Therefore, using these values in the equation, we get:

t = (5.4 x 10¹⁰ m)/(3 x 10⁸ m/s)

t = 180 s = 3 minutes

Hence, the light must reach the exoplanet in 3 minutes.

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