Reflection and Refraction of Light

# Reflection and Refraction of Light - reflection&...

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Unformatted text preview: reflection & refraction of light PHY232 Remco Zegers [email protected] Room W109 – cyclotron building http://www.nscl.msu.edu/~zegers/phy232.html http://www.phys.pe.kr/03_wave/03_wave_menu.html PHY232 - Remco Zegers reflection & refraction of light 2 quiz (extra credit) which of the following is not correct in case of an AC LRC circuit? ) in case the inductive (X L ) and capacitive reactances (X C ) are equal in size, the rms current through the circuit is largest. ) The current through and voltage over the resistor are in always in phase ) if the LRC circuit is in resonance, both the capacitive reactance and inductive reactance must be zero ) the rms current at resonance (I.e. when it is largest) is independent of the frequency. PHY232 - Remco Zegers reflection & refraction of light 3 light c=f λ light: wavelike oscillation of E and B fields (just like any electromagnetic radiation). The only things special about it, is that we can see it. PHY232 - Remco Zegers reflection & refraction of light 4 light rays and wave-front isotropic light source (uniform in all directions): ¾ the wavefronts indicate maxima in the E/B oscillations ¾ the rays indicate the direction of the wave fronts ¾ I=P source /(4 π R 2 ) I: intensity (W/m 2 ) P source :power of source. R distance from source wavefront rays PHY232 - Remco Zegers reflection & refraction of light 5 Huygens principle All points on a wavefront serve as point sources of spherical secondary wavelets. After a time t, the new positions of the wavefront will be the tangent of these secondary wavelets motion of a plane wave: vt 1 vt 2 t=0 PHY232 - Remco Zegers reflection & refraction of light 6 Huygens principle II For a circular wavefront… t=0 vt 1 vt 2 PHY232 - Remco Zegers...
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Reflection and Refraction of Light - reflection&...

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