## Solid state physics |

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Page 101

Consider a collision between a

rest. After the collision, the

direction (as shown in Fig. 5-1). The initial wavelength of the

an ...

Consider a collision between a

**photon**and an electron. The electron is initially atrest. After the collision, the

**photon**emerges in a direction 90° from its originaldirection (as shown in Fig. 5-1). The initial wavelength of the

**photon**is 1.542 A (an ...

Page 266

Electrons prefer to be in state 1 which has the lower energy. Any electron which

happens to be in state 2 can spontaneously fall into state 1, emitting a

energy hu> - E2 - E\. This process is called spontaneous emission (see Fig.

Electrons prefer to be in state 1 which has the lower energy. Any electron which

happens to be in state 2 can spontaneously fall into state 1, emitting a

**photon**ofenergy hu> - E2 - E\. This process is called spontaneous emission (see Fig.

Page 268

so that there now four

, causing their number to quickly multiply, like a chain reaction. Soon there are a

large number of

so that there now four

**photons**. Each stimulated emission creates another**photon**, causing their number to quickly multiply, like a chain reaction. Soon there are a

large number of

**photons**present, each with energy hu = E2 - E\. Also, each ...### What people are saying - Write a review

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### Contents

XRay Diffraction | 37 |

Lattice Vibrations | 61 |

Classical Model of Metals | 89 |

Copyright | |

12 other sections not shown

### Common terms and phrases

Answer Appendix basis vectors bcc lattice bond Bragg angle Bragg's Law Bravais lattice Brillouin zone called Chapter collisions conduction electrons Consider conventional unit cell Cooper pairs depletion layer diode direction dispersion curve displacement distance doped effective mass elec electric current electric field electrons and holes emitter energy band equal example Fermi energy Fermi level Fermi surface force forward biased free electron free particle frequency given by Eq inside integers ions k-space laser lattice parameter lattice points lattice vector lattice wave magnetic field n-type semiconductor NaCl negative neutrons number of electrons obtain occupied one-dimensional oscillate p-n junction photon positively charged potential energy primitive unit cell Problem rays reciprocal lattice reverse biased sc lattice scattered Schroedinger's equation shown in Fig sodium metal solid structure superconductor temperature tion transistor trons unit cell unoccupied values velocity voltage wave function wave number wave vector wavelength Wigner-Seitz cell wire x-ray diffraction zero