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11 Cards in this Set
- Front
- Back
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Converging Lens |
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Diverging Lens |
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Refraction |
-When radiation waves slow down they bend towards the normal. -Light enters glass it slows to 2/3s its speed in air. -If wave hits boundary at 90° no change - slows -When light hits new medium some light pass through some is reflected. |
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Refraction diagram |
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Converging lens rules |
-Incident ray = parallel to axis. Refraction through lens and focal point. -Incident ray = Through focal point before lens. Refraction through lens. Travels parallel to the axis. -Incident ray = passing through lens centre. Carries on in same direction. |
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Diverging lens rules |
-Incident ray = Parallel to axis. Refracts through lens and travels inline with focal point. -Incident ray = Passing towards focal focal point. Refracts through lens and travels parallel to the axis. -Incident ray = Passing through lens centre. carries on in same direction. |
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Object placed at 2F |
Image: Real Inverted Same size as object Appears at 2F |
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Object placed between F and 2F |
Image:
Real Inverted Bigger than object Appears beyond 2F |
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Object placed nearer than F |
Image:
Virtual Same orientation as object Bigger than object Appears on the same side of lens as the object |
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Powerful Lens makes = _________ focal length
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Short
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Lens Equation |
1/F = 1/U +1/V
F = Focal Length U = Object Distance V = Image Distance |
