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13 Cards in this Set
- Front
- Back
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Ray model of light |
The ray model of light suggests that we can see an object because light reaches our eyes from each point of the object |
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Natural light |
Visible light emitted from solar radiation - covers full spectrum from red to violet |
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Reflection |
Reflection is where the light from a single incoming direction is reflected into a single outgoing direction |
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Refraction |
Refraction occurs when light waves travel from one medium with a given refractive index to a medium with another |
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Diffraction |
Diffraction refers to the bending, spreading and interference of waves passing by an object or aperture that disrupts the wave |
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Dispersion |
Dispersion causes the spatial separation of a white light into spectral components of different wavelengths |
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3 types of lenses |
Convex ) Concave ( Compound |
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Convex |
When a beam of light travels parallel to the lens axis and passes through a convex lens it will be converged (or focused) to spot on the axis |
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Concave |
When a parallel beam of light passes through a concave lens the rays of light are diverged |
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Compound |
Compound lenses are a combination of simple lenses which have two or more lenses on the same axis |
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Magnification |
Process of enlarging something only in appearance, not in physical size Magnifying power is a number describe by which factor an object was magnified |
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Cross wires |
A cross wire is a reference scale placed into an optical instrument- usually independently focused |
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Field of view |
The angular extent of the observable world that is seen at any given moment (humans have almost 180 degree forward facing field of view. Apparent field of view is a derived constant value for a given eyepiece used to calculate the field of view |
