Question

light waves travels with a speed of 3 into 10 raise power 8 metre per second Express the speed in miles per hour

Answer 1

Hello Dear.

Here is the answer---

••••••••••••••••••

Speed of the light = 3 × 10^8 m/s.

Let us change the meter into miles in first step.

Thus, In one second light travels a distance of 3 × 10^8 m.

In one second distance travels by light is 300000 km.

In one second light travels a distance of 300000/1.609 miles. (Since, 1 miles = 1.609 km)
= 186451.21 miles.


Now, speed of the light in miles per second is 186451.21 miles/seconds.

Changing the speed of the light in miles/ hour.

For this, multiplying 186451.21 with 3600.
(Since, 1 second = 1/3600 hour)

Thus, speed of the light = 186451.61 × 3600 miles/hour.
= 671224362.958 miles/hour.


••••••••••••••••••••••

Hope it helps.

Have a Good Day.

Answer 2

Answer:

Speed of the light = 3 × 10^8 m/s.

Let us change the meter into miles in first step.

Thus, In one second light travels a distance of 3 × 10^8 m.

In one second distance travels by light is 300000 km.

In one second light travels a distance of 300000/1.609 miles. (Since, 1 miles = 1.609 km)

= 186451.21 miles.

Now, speed of the light in miles per second is 186451.21 miles/seconds.

Changing the speed of the light in miles/ hour.

For this, multiplying 186451.21 with 3600.

(Since, 1 second = 1/3600 hour)

Thus, speed of the light = 186451.61 × 3600 miles/hour.

= 671224362.958 miles/hour.