How long would it take a laser beam to go to the Moon and back if the distance to the Moon is 3.8 x 108 m?

I know that Velocity of light is 3x10^8 m/s

the answer given is 2 sec

To determine the time it would take for a laser beam to go to the Moon and back, we can use the formula:

Time = Distance / Velocity

Given that the distance to the Moon is 3.8 x 10^8 m and the velocity of light is 3 x 10^8 m/s, we can substitute these values into the formula:

Time = 2 * (3.8 x 10^8 m) / (3 x 10^8 m/s)

Simplifying the expression:

Time = 7.6 x 10^8 m / (3 x 10^8 m/s)

Now, we can simplify the units and divide the numbers:

Time = (7.6 / 3) s

Calculating the result:

Time ≈ 2.53 seconds

Therefore, it would take approximately 2.53 seconds for the laser beam to travel to the Moon and back.

To calculate the time it would take for a laser beam to travel to the Moon and back, you need to divide the total distance by the speed of light.

Given:
Distance to the Moon = 3.8 x 10^8 m
Speed of light = 3 x 10^8 m/s

To find the time it takes, you can use the formula:

Time = Distance / Speed

Substituting the given values:

Time = (3.8 x 10^8 m) / (3 x 10^8 m/s)

Now, to simplify the equation, divide both the numerator and the denominator by 10^8:

Time = 3.8 / 3

Finally, calculate the result:

Time = 1.27 seconds

Therefore, it would take approximately 1.27 seconds for a laser beam to travel from Earth to the Moon and back.