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21 Cards in this Set
- Front
- Back
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Fermat’s principle |
light takes the pathof least time. |
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Law of Reflection |
Θi = Θr |
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Snell's Law |
n1sinΘ1=n2sinΘ2 |
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Focal Length |
Distance from lens to focal point |
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Parallel rays.. |
pass through focal point |
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Rays through focal point.. |
become parallel |
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Rays through the centre... |
are not bent |
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If an object is at a larger distance than 2f.. |
a real and inverted image is formed that is smaller |
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If an object is at a distance between f and 2f.. |
a real and inverted image is formed that is larger |
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if an object is at a distance smaller than f.. |
a virtual and upright image is formed that is larger |
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A diverging lens always forms a.. |
virtual, upright image that is smaller |
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Positive focal length |
converging lens |
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Negative focal length |
Diverging lens |
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Positive object distance |
object to left of lens (real) |
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Negative object distance |
only on optical systems |
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Positive image distance |
image formed to right of lens (real) |
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Negative image distance |
image formed to left of lens (virtual) |
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Positive Magnification |
image is upright |
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Negative Magnification |
Image is inverted |
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Thin Lens Equation |
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Magnification equation |
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