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20 Cards in this Set
- Front
- Back
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refractive index |
ratio of speed in vacuum to the speed in the substance |
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as light enter the prism |
the colour have different wavelength different wavelength travels at different speeds and refract by different amounts |
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light leave the prism |
everything bend away from the normal red refract least violet refract most all wavelengths continue at the same speed |
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Refraction |
change of speed when a wave moves from 1 mediums to another |
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n1 to n2 n1>n2 |
away |
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n2 >n1 n1 to n2 |
towards |
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critical angle (def & eqn) |
angle of incidence that causes angle of refraction at 90°
sin C = n2/n1 (n1 to n2) |
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condition of total internal reflection |
n1>n2 incidence > C |
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optical fibre--use |
decorative lighting medical endoscope Internet |
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purpose of cladding |
-protect core -have lower refractive index than core so total internal reflection can occur |
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Why narrow core? |
narrow core lower the MDP |
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MPD |
multipath dispersion effect on signal: diff rays take diff path each travel at diff dist so arrive at different time |
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covex concave eqn |
P = 1/f = 1/u+1/v m = v/u = img/obj |
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describes len |
real virtual diminished magnified upright inverted |
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>2f |
inverted real magnified |
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=2f |
real no magnified inverted |
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BTWN f and 2f |
inverted real magnified |
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=f |
no img |
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<f |
magnified virtual upright |
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concave (diverging) |
virtual diminished upright |
