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Light travels at 3 x 105 km/s (300,000 km or 186,000 miles). How long will it take to get to earth? (A distance of 1.5 x 108 km)

0.2 s

0.8 s

8 s

8 minutes

Respuesta :

Answer:

Option (4)

Explanation:

Here, Speed of light= [tex]3\times10^5[/tex] Km/sec

Distance= [tex]1.5\times10^8[/tex] Km

We know that,

[tex]Speed=\frac{Distance}{Time}[/tex]

[tex]\implies Time=\frac{Distance}{Speed}[/tex]

[tex]Time=\frac{1.5\times10^8}{3\times 10^5}[/tex]

[tex]=0.5 \times10^3[/tex]

=500 sec

=8 minutes 20 sec

Hence, the correct answer is option (4) i.e 8 minutes.

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