light travels at a constant speed of 3x10*11 cm/sec. how long does it take light to reach the earth a distance of 1.5x10*8 km. give the answers in seconds and minutes.
distance = 1.5 x 10^ 8 km
velocity of light = 300,000 kilometers per second
time = distance / velocity = (1.5 x 10^ 8 ) / 300 000 = 500 seconds =
8 minutes and 20 seconds ans.
To calculate the time it takes for light to reach a certain distance, we need to use the formula:
Time = Distance / Speed
Let's first convert the given distance from kilometers to centimeters, as the speed of light is given in centimeters per second:
1.5 x 10^8 km * 10^5 cm/km = 1.5 x 10^13 cm
Now, we can calculate the time it takes for light to travel this distance:
Time = 1.5 x 10^13 cm / (3 x 10^11 cm/sec)
Simplifying the equation:
Time = 50 seconds
To convert this time into minutes, divide the time in seconds by 60:
Time in minutes = 50 seconds / 60 = 0.83 minutes (rounded to two decimal places).
Therefore, it takes approximately 50 seconds or 0.83 minutes for light to reach the Earth from a distance of 1.5 x 10^8 km.