Light - Iona Physics · 1 May 1212:11 PM Light May 1212:12 PM Apr 266:17 PM Chapter 27: Light...

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1 May 1212:11 PM Light May 1212:12 PM Apr 266:17 PM Chapter 27: Light Question: Particle or wave? Newton Particles Huygens Wave Einstein Particles (photons) Apr 266:17 PM Now: Light has a dual nature, sometimes it acts like a particle and sometimes it acts like a wave. May 117:34 AM Speed of Light = 3.00 x10 8 m/s Definition: Light travels exactly 2.99792458 x10 8 m/s May 117:29 AM

Transcript of Light - Iona Physics · 1 May 1212:11 PM Light May 1212:12 PM Apr 266:17 PM Chapter 27: Light...

Page 1: Light - Iona Physics · 1 May 1212:11 PM Light May 1212:12 PM Apr 266:17 PM Chapter 27: Light Question: Particle or wave? Newton  Particles Huygens  Wave

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May 12­12:11 PM

Light

May 12­12:12 PM

Apr 26­6:17 PM

Chapter 27: Light

Question: Particle or wave?

Newton ­ ParticlesHuygens ­ WaveEinstein ­ Particles (photons)

Apr 26­6:17 PM

Now: 

Light has a dual nature, sometimes it acts like a particle and sometimes it acts like a wave.

May 11­7:34 AM

Speed of Light = 3.00 x108 m/s

Definition:  Light travels exactly  2.99792458 x108 m/s

May 11­7:29 AM

Page 2: Light - Iona Physics · 1 May 1212:11 PM Light May 1212:12 PM Apr 266:17 PM Chapter 27: Light Question: Particle or wave? Newton  Particles Huygens  Wave

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May 11­7:36 AM

Substances may be • Transparent• Translucent• Opaque

Light makes atoms vibrate and they pass the vibration along.

May 11­7:38 AM

Shadows:From a point source

From an extended source

May 11­7:40 AM

Eclipses:

May 11­7:45 AM

Polarization