What happens to projected light after the source stops

  • Thread starter AMan24
  • Start date
58
2
Let's say a flashlight or a laser is turned on and there's light coming out of it. Once you turn the flashlight or laser off what exactly happens to the projected light? Obviously it won't be visible anymore, but where does it go?
 
112
26
Simply put, it's absorbed by the objects surrounding it.
 
58
2
Simply put, it's absorbed by the objects surrounding it.
Ok now I get it. Thanks
 
The energy of the light is transferred to the atoms it comes in contact with, if it does... they then might pass on that energy in different ways. light, heat, etc.
 

SteamKing

Staff Emeritus
Science Advisor
Homework Helper
12,794
1,662
Perhaps the light gets absorbed, perhaps not. Remember, light travels at 300,000 km / sec, so who's to say the light sticks around to get absorbed? By the time you'd notice the beam is shut off, the last photons have almost reached the orbit of the moon. :wink: :eek:
 

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top