Question

the distance of the sun from the earth is one hundred forty three million flour hundred thousand kilometer and light travel from the former to the latter in seven minutes and fifty eight seconds. find the speed of light per second

Answer 1

Answer:

500 seconds.

Explanation:

Time = distanceSpeed=93000000186000=500 seconds.

On the average, more precise answer is

149597871 km299792.5.kmsec=499.005 seconds, nearly.

Answer 2

Answer:

Since, the total distance = 1,43,000,400 thousand km,

= 1,43,000,400,000 km

Since, the total time taken = 7 minutes 58 seconds

= ( 420 + 58 ) seconds

= 478 seconds

Also,

$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$

Thus, the speed of light

$= \frac{1,43,000,400,000}{478}\text{ meter per seconds}$

$=299164016.736\text{ meter per seconds}$

$=2.99164016736\times 10^8\text{ meter per sec}\approx 3.0\times 10^8\text{ meter per sec}$

Hence, the speed of light is approximately $3\times 10^8$ meter per seconds.