Term
| When VL encounters a material, what happens? |
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Definition
| It is either re-emitted or absorbed and turned into thermal energy |
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Term
| Can VL be both re-emitted and absorbed? |
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Definition
| Yes, infact it is more likely |
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Term
| When the re-emitted light is send back into the medium it came from, what is that called? |
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Definition
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Term
| When the re-emitted light passes through a transparent material; it changes its course before travelling through the material in a strait line, what is called? |
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Definition
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Term
| When light falls on an object, what happens? |
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Definition
| It excites electrons in the object |
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Term
| What do enerized electrons do? |
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Definition
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Term
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Definition
| The frequency of re-emitted light |
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Term
| State the Principle of Least Time. |
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Definition
"Light will take the path that requires the shortest time"
-Some dude |
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Term
| State the Law of Refraction. |
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Definition
| "Light will ba able to travel from point A to point B fastest if the angle of incidence equals the angle of refraction" |
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Term
| Explain the Law of Reflection. |
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Definition
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Term
| If you put a candle infront of a mirror, how many rays of light are emited from the mirror? |
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Definition
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Term
| The rays will diverge from the flame, and then what? |
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Definition
| They diverge from the mirror |
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Term
| Reminder: The light ray's angle of incedince is ______________________. |
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Definition
| Equal to the angle of reflection |
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Term
| The rays appear to be coming from behind the mirror, what are they called? |
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Definition
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Term
| Compare the real object and the VI. |
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Definition
| Identical copies, on different sides of the mirror |
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Term
| Why dont curved mirrors work accurately? |
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Definition
| Each angle of incidence still equals each angle of reflection, but the size and distance of these VI can change |
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Term
| What is diffuse reflection? |
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Definition
| When light falling on a rough surface is reflected in many directions |
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Term
| What is the speed of light in air? |
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Definition
| A little bit less than 3×108 m/s |
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Term
| What is the speed of light in water? |
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Definition
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Term
| Explain the path of least time with an angled ray. What will happen? |
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Definition
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Term
| What will happen with a perpindicular ray? |
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Definition
| Path of least time = path of shortest distance |
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Term
| What is the contant for the speed of light? |
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Definition
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Term
| What is the speed of light in a vacuum? |
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Definition
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Term
| What is the speed of light in any medium? |
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Definition
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Term
| What happens with higher frequency EM waves? |
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Definition
| The higher the frequency, the slower the speed |
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Term
| Explain why a prism seperates light colors. |
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Definition
[image]
The white light goes in, and since the speeds are different, the seperate light colors come out at different times and at different angles. |
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Term
| What is total internal reflection? |
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Definition
[image]
Light strikes the boundary between two mediums and is completely reflected |
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Term
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Definition
| Angle of incedence > critical angle |
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