Kennelly-Heaviside layer

The Kennelly-Heaviside layer, also known as the E region or just as the Heaviside layer, named after Oliver Heaviside, is a layer of ionised gas occurring at 90-150km in above the ground — one of several layers in the Earth's ionosphere. It reflects medium-frequency radio waves, and because of this reflection radio waves can be propagated beyond the horizon.

Cultural impact

The "Heaviside layer" is used as a symbol for heaven (in the afterlife sense) in Andrew Lloyd Webber's musical Cats. This reference is based on a quote found in a letter written by T. S. Eliot, whose book Old Possum's Book of Practical Cats forms the basis of the musical.

Related Topics:
Andrew Lloyd Webber - Cats - T. S. Eliot - Old Possum's Book of Practical Cats

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