A laser beam from Earth is reflected back from a mirror on the Moon in 2.60 s. If the distance between Earth and the Moon is 3.85 × 108 m, calculate the speed of light.

Respuesta :

[tex]\text{speed}=2.96\times\text{ }10^8\text{ }\frac{\text{m}}{s}[/tex]

Explanation

the speed of an object is given by:

[tex]\text{speed}=\text{ }\frac{dis\tan ce}{\text{time taken}}[/tex]

then

Step 1

Let

[tex]\begin{gathered} \text{Time}=2.6\text{ s} \\ \text{distance}=\text{ 2(}3.85\times10^8)=7.7\times10^8 \end{gathered}[/tex]

Now, replace

[tex]\begin{gathered} \text{speed}=\text{ }\frac{dis\tan ce}{\text{time taken}} \\ \text{speed}=\text{ }\frac{7.7\times10^8\text{ m}}{2.6\text{ s}} \\ \text{speed}=2.96\times\text{ }10^8\text{ }\frac{\text{m}}{s} \end{gathered}[/tex]

so, the answer is

[tex]speed_c=2.96\times\text{ }10^8\text{ }\frac{\text{m}}{s}[/tex]

I hope this helps you