Understanding Brightness and Distance

The brightness of a light source decreases with the square of the distance. This is called the inverse square law.

Calculation

* Original Distance: Let's assume the Sun is currently 1 unit away.

* New Distance: The Sun is now 10 units away (ten times further).

* Brightness Change: Since brightness is inversely proportional to the square of the distance, the new brightness would be 1/10² = 1/100th of the original brightness.

Conclusion

If the Sun were ten times further away, it would appear 100 times dimmer.