## Physical Properties of Crystals: Their Representation by Tensors and Matrices |

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Page 236

The value of c/v for each wave may be called the

The

common wave normal, are obtained by drawing an ellipsoid known as the

indicatrix.

The value of c/v for each wave may be called the

**refractive index**n for that wave.The

**refractive indices**of the two waves, as functions of the direction of theircommon wave normal, are obtained by drawing an ellipsoid known as the

indicatrix.

Page 242

The change in

as the electro-optical effect. It has to be remembered that permittivity depends on

the frequency of the electric field. Keeping to the special case used above, ...

The change in

**refractive index**of a crystal produced by an electric field is knownas the electro-optical effect. It has to be remembered that permittivity depends on

the frequency of the electric field. Keeping to the special case used above, ...

Page 243

of the crystal, then there is no reason why reversing the field should not change

the

of constants necessary to represent the electro- optical effect in crystals of ...

of the crystal, then there is no reason why reversing the field should not change

the

**refractive index**, and so the first-order term (aE0) would remain. f The numberof constants necessary to represent the electro- optical effect in crystals of ...

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### Contents

THE GROUNDWORK OF CRYSTAL PHYSICS | 3 |

EQUILIBRIUM PROPERTIES | 51 |

ELECTRIC POLARIZATION | 68 |

69 other sections not shown

### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter coefficients conductivity crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dijk direction cosines electric field electro-optical effect ellipsoid equal equation example expression follows force given gives heat flow Hence hexagonal indicatrix isothermal isotropic lattice left-handed magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optic axis optical activity orientation permittivity perpendicular photoelastic effect piezoelectric effect plane plate point group positive principal axes produced pyroelectric effect quadric quantities radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor set of axes shear shown shows strain stress suffix notation symbol symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values wave normal wave surface written zero