The property of a telescope that has no effect on the inverse square law is light - gathering power.
Explanation:
Light - gathering power has a lot more capacity that an human eye in collecting a lot more light. And the property of a telescope that has no effect on the inverse square law is light - gathering power.
The telescope takes up all the photons that comes upon it from any far away object acting like a 'light bucket'. With a time interval the telescope collects the light like collecting rain water in a bucket.
And this is the reason for the enlargement of pupils in the night as the light reaches out to the retinas making the faint images brighter.
