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   _____     ___       _____   _    _     _____   
  / ___//   / _ \\    / ___// | || | ||  /  ___|| 
  \___ \\  / //\ \\   \___ \\ | || | || | // __   
  /    // |  ___  ||  /    // | \\_/ || | \\_\ || 
 /____//  |_||  |_|| /____//   \____//   \____//  
`-----`   `-`   `-` `-----`     `---`     `---`

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Text this: Effective permittivity of layered dielectric sphere composites