Like a lot of other things, (gravity, sound, electrostatic force), brightness also decreases as the square of the distance.
When the source moves to a new position that's 4 times as far away, its apparent brightness becomes (1/4^2) its original value.
That's 1/16 .
As we know, the brightness of the Sun will decrease as it moves four times farther from Earth.
The decrease in the brightness of the Sun will happen when the light spread out over a larger surface and scatters as the Sun moves further from the Earth.
The Sun is the only brightest object in the sky on Earth.
The Sun sends out energy in all directions, making it shine brightly.
Therefore, we can conclude that when the Sun moves further its brightness decreases.
Learn more about the Sun here:
brainly.com/question/15837114
