Question

The Earth is approximately 150 million kilometers away from the Sun. If light travels at a speed of approximately 300,000 kilometers per second, about how long does it take for light from the Sun to reach the Earth?

Answer 1

about 10 minutes

Step-by-step explanation:

study island

Answer 2

The correct answer to the question is 8.33 minutes.

CALCULATION:

The distance of earth from sun s = 150 million km.

We know one million = 10 lakh =
`10^6`

Also 1 km =
`10^3\ m`

Hence, the distance s =
`150* 10^6* 10^3\ m`

=
`15* 10^(10)\ m`

The speed of light c = 300,000 km per second

=
`3* 10^8\ m/s`

We are asked to calculate the time.

The time of the reaching earth is calculated as -

`time=\ (distance)/(velocity)`

`t=\ (s)/(c)`

`=\ \frac{15* 10^(10)} {3* 10^8}\ second`

`=\ 500\ seconds`

We know one minute = 60 second.

Hence, 500 seconds =
`(500)/(60)\ minute`

=
`8.33\ minute` [ans]