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  ______    ______   _    _     ______   __   __  
 /_____//  /_   _// | \  / ||  /_   _//  \ \\/ // 
 `____ `    -| ||-  |  \/  ||   -| ||-    \   //  
 /___//     _| ||_  | .  . ||   _| ||_    / . \\  
 `__ `     /_____// |_|\/|_||  /_____//  /_//\_\\ 
 /_//      `-----`  `-`  `-`   `-----`   `-`  --` 
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Text this: A new closed-form solution to light scattering by spherical nanoshells