01_24_Beats_Reflections

01_24_Beats_Reflections - Today 1/24 o HW: 1/23 Handout...

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Unformatted text preview: Today 1/24 o HW: 1/23 Handout Beats and Boundaries due Wednesday 1/29 o Today: Beats 17.4 Reflections at Boundaries 27.3 o Monday: Thin Film Interference 27.3 o Labs start Monday Next Weeks Lab: Microwaves o A wave in the electric field o Reflection and transmission from and through wood o Reflection from metal (why metal is bad in your microwave) o Polarization (see section 24.6) o Interference (Youngs Double Slit) Beats o Occur when the frequencies of the sources are not the same o Frequencies must be close o Locations for constructive interference move over time o Causes sound to get loud and soft o f b beat frequency depends on source frequency difference 0.5 s 10 Hz 12 Hz 2 Hz Sources emitting different frequencies. Source 1 Source 2 In this case they are alternately in and out of phase as time goes by. Source 1 Source 2 Sources emitting different frequencies. In this case they are alternately in and out of phase as time goes by. Source 1 Source 2 Sources emitting different frequencies. In this case they are alternately in and out of phase as time goes by. Source 1 Source 2 Sources emitting different frequencies....
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This note was uploaded on 12/21/2010 for the course PHYS Physics 21 taught by Professor Larrywatson during the Spring '08 term at North Dakota.

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01_24_Beats_Reflections - Today 1/24 o HW: 1/23 Handout...

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