What happens to projected light after the source stops

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When a flashlight or laser is turned off, the projected light is no longer visible because it is absorbed by surrounding objects. The energy from the light is transferred to the atoms it encounters, which may then release that energy as heat or other forms of light. However, light travels at an incredibly fast speed of 300,000 km/s, meaning the last photons continue moving even after the source is turned off. By the time the beam is perceived to be shut off, the final photons may have traveled significant distances. Ultimately, the light dissipates as it interacts with the environment.
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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?
 
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Simply put, it's absorbed by the objects surrounding it.
 
mrnike992 said:
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.
 
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:
 
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