Question

1 light second into Kilometers
Answer by using two significant figures

Answer 1

Answer:

3.0 x 10^5 km

Step-by-step explanation:

c = 299,792,458 metres per second

c = 299,792 km per second

1 light second =  299,792 km

To two significant figures

300,000 km

3.0 x 10^5 km

Answer 2

In 1 light second there are $3\times 10^5$ kilometers.

$1 \text{light seconds}=3.0\times 10^5 km$

Step-by-step explanation:

• The definition of speed is the distance covered per unit time.
• The speed of the light in a vacuum is $3.0\times 10^8 m/s$..
• The 1 light second is defined as the distance traveled by light in 1 second in free space.

To find:

Value of 1 light  second into Kilometers

Solution:

Speed of light in space = $3.0\times 10^8 m/s$

This means that in 1 second light travels $3.0\times 10^8 m/s$.

1 m = 0.001 km

The distance traveled by the light in Km in a second will be:

$3\times 10^8 m= 3\times 10^8\times 0.001 km =3.0\times 10^5 km$

So, from this, we can conclude that in 1 light second there are $3\times 10^5$ kilometers.

$1 \text{light seconds}=3.0\times 10^5 km$

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