Questions: What isthe moximum size of an object that gests brighter and fairfer on a timescale of seconds?
Transcript text: What isthe moximum size of an object that gests brighter and fairfer on a timescale of seconds?
Solution
Solution Steps
Step 1: Understanding the Question
The question asks about the maximum size of an object that can change in brightness and fairness on a timescale of seconds. This involves understanding the relationship between the size of an object and the time it takes for light to travel across it.
Step 2: Analyzing the Options
a few light seconds across: This means the object is a few light seconds in diameter, which is a reasonable size for changes on a timescale of seconds.
it can be any size: This is unlikely because larger objects would take longer for light to travel across, thus changing brightness on a longer timescale.
a few kilometers across: This is much smaller than a few light seconds and would change brightness very quickly.
a few nd across: This option is unclear and likely a typographical error.
Step 3: Applying the Concept of Light Travel Time
The maximum size of an object that can change brightness on a timescale of seconds is determined by the distance light can travel in that time. Light travels approximately 299,792 kilometers per second. Therefore, an object a few light seconds across would be the correct size.