it takes light 1 second to travel our planet, in a fictional sense, if it takes light 52 seconds to travel around the entire planet, how large is it in size? be specific and do the math for both questions

3 answers

To determine the size of the planet based on the time it takes for light to travel around it, we can use the speed of light, which is approximately \(299,792,458\) meters per second.

Question 1: Light taking 1 second to travel across the planet

In this case, if light takes 1 second to travel across the planet, it means it covers a distance equal to the diameter of the planet in that time:

\[ \text{Distance} = \text{Speed of Light} \times \text{Time} \]

Substituting in the values we have:

\[ \text{Distance} = 299,792,458 , \text{m/s} \times 1 , \text{s} = 299,792,458 , \text{meters} \]

So, the diameter of the planet is \(299,792,458\) meters.

Question 2: Light taking 52 seconds to travel around the entire planet

If light takes 52 seconds to travel around the planet, then it covers the circumference of the planet in that time:

\[ \text{Circumference} = \text{Speed of Light} \times \text{Time} \]

Substituting in the values:

\[ \text{Circumference} = 299,792,458 , \text{m/s} \times 52 , \text{s} = 15,592,789,816 , \text{meters} \]

To find the diameter from the circumference, we can use the formula:

\[ \text{Circumference} = \pi \times \text{Diameter} \]

Rearranging gives us:

\[ \text{Diameter} = \frac{\text{Circumference}}{\pi} \]

Now substituting the circumference we calculated:

\[ \text{Diameter} = \frac{15,592,789,816}{\pi} \approx \frac{15,592,789,816}{3.14159} \approx 4,973,097,785 , \text{meters} \]

Summary

  1. If light takes 1 second to travel across the planet, the diameter is approximately \(299,792,458\) meters.
  2. If light takes 52 seconds to travel around the planet, the diameter is approximately \(4,973,097,785\) meters.
so is that the size of jupiter? the sun? larger than the sun?

Let's compare the sizes:

  1. Diameter of Jupiter: Approximately \(139,822\) kilometers (or \(139,822,000\) meters).

  2. Diameter of the Sun: Approximately \(1,391,000\) kilometers (or \(1,391,000,000\) meters).

  3. Your fictional planet:

    • From question 1 (light takes 1 second to cross): \(299,792,458\) meters (or about \(299.8\) kilometers).
    • From question 2 (light takes 52 seconds to circumnavigate): approximately \(4,973,097,785\) meters (or about \(4,973\) kilometers).

Comparisons:

  • Fictional planet with 1 second travel time:

    • Diameter = \(299.8\) kilometers, which is much smaller than both Jupiter and the Sun.
  • Fictional planet with 52 seconds travel time:

    • Diameter = approximately \(4,973\) kilometers, which is still significantly smaller than Jupiter and the Sun.

Conclusion:

The fictional planet you described (both scenarios) is far smaller than Jupiter and significantly smaller than the Sun. Specifically:

  • Jupiter is about \(28\) times larger in diameter than the fictional planet with a travel time of 52 seconds.
  • The Sun is about \(280\) times larger in diameter than the same fictional planet.