Here’s my question explained with a little more detail….
Room #1: Blackout curtains/blinds/shades have been drawn for one day. No sunlight whatsoever has entered the room that entire day.
Room #2: All curtains/blinds/shades have been kept open the entire time. However, the blackout curtains/blinds/shades have now been drawn, at the end of the day.
A scientist enters each now-darkened room. Can the scientist accurately detect or measure which room was the “sunnier” room during that day?
Putting aside long-term sun bleaching, which I understand can lighten fabrics when they are exposed to sunlight over a long period of time, my question is whether the photons of sunlight from a single day could be detectable, objectively, at the end of that day. Does sunlight “change” anything that can be measured, after the light is gone?
In: Physics
Surfaces in the sunlit room will have a higher temperature that will take some time to reach equilibrium with the darkened room again.
Latest Answers