Exploring Reflection: Light's U-Turns

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In summary, the behavior of light when it interacts with a surface depends on whether it is truly reflected or absorbed and re-emitted. When light is truly reflected, it does not stop but rather changes direction. However, if it is absorbed and re-emitted, there is a very small period of time between absorption and re-emission. This concept is relevant in understanding the speed of light when it goes from one medium to another.
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StevenJParkes
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Does the light stop and turn back or does it interact with the surface and make a u turn.
 
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When light is truly reflected, it does not 'stop'---the waveform is essentially redirected from the forward direction to the reverse direction. If you've played the game Portals, you might imagine the wave going into and back out of the same place.

If the light isn't actually reflected, but is instead absorbed and re-emitted in the reverse direction, then there is some very very small period of time between it being absorbed and re-emitted.
 
  • #3


zhermes said:
When light is truly reflected, it does not 'stop'---the waveform is essentially redirected from the forward direction to the reverse direction. If you've played the game Portals, you might imagine the wave going into and back out of the same place.

If the light isn't actually reflected, but is instead absorbed and re-emitted in the reverse direction, then there is some very very small period of time between it being absorbed and re-emitted.

I read an argument that light does not actually slow down when it goes from one medium into another but that it is absorbed and re-emitted. This is partly why I asked the question. Pretty sharp of you to see that.
 

1. What is reflection in the context of light?

Reflection is the phenomenon in which light bounces off a surface and changes direction. It is an important aspect of optics and plays a crucial role in how we see and perceive our surroundings.

2. How does the angle of incidence affect the angle of reflection?

The angle of incidence, or the angle at which light hits a surface, is equal to the angle of reflection, or the angle at which light bounces off the surface. This relationship is known as the law of reflection and holds true for all types of surfaces.

3. What are the different types of reflection?

There are two main types of reflection: specular and diffuse. Specular reflection occurs when light bounces off a smooth surface, such as a mirror, at a single angle. Diffuse reflection occurs when light hits a rough surface, such as a wall, and is scattered in multiple directions.

4. How do mirrors work?

Mirrors work by reflecting light at an equal and opposite angle, creating an image that appears to be behind the mirror. This is due to the smooth surface of the mirror, which allows for specular reflection. The type of mirror used, such as concave or convex, determines the characteristics of the reflected image.

5. What is the difference between reflection and refraction?

Reflection and refraction are both ways in which light can change direction. Reflection involves light bouncing off a surface, while refraction involves light passing through a medium and changing direction due to a change in the medium's density. This is why objects appear distorted when viewed through a glass of water or a lens.

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