The speed of light is 3x10^8 m/s. If the sun is 1.5 x10^11 meters from the earth, how many seconds does it take light to reach the earth?

To calculate the time it takes for light to reach the Earth from the Sun, we can use the formula:

Time = Distance / Speed

Given that the speed of light is 3x10^8 m/s and the distance from the Sun to the Earth is 1.5x10^11 meters, we can substitute these values into the formula:

Time = (1.5x10^11 meters) / (3x10^8 m/s)

Now let's simplify the calculation:

Time = 5x10^2 seconds

Therefore, it takes approximately 500 seconds for light to reach the Earth from the Sun.

To find out how many seconds it takes light to reach the Earth from the Sun, we can use the formula: time = distance / speed. Let's plug in the values given:

Distance = 1.5 x 10^11 meters
Speed of light = 3 x 10^8 m/s

time = (1.5 x 10^11 meters) / (3 x 10^8 m/s)

To simplify this calculation, we can divide both the numerator and denominator by 3:

time = (1.5 x 10^11 meters) / (3 x 10^8 m/s) = (5 x 10^10 meters) / (10^8 m/s)

Now, in order to perform the division, we can subtract the exponents:

time = 5 x 10^(10 - 8) seconds = 5 x 10^2 seconds

Therefore, it takes light approximately 500 seconds (or 8 minutes and 20 seconds) to reach the Earth from the Sun.

time = distance / velocity