Artwork: How radio waves travel from a transmitter to a receiver. 1) Electrons rush up and down the transmitter, shooting out radio waves. 2) The radio waves travel through the air at the speed of light. 3) When the radio waves hit a receiver, they make electrons vibrate inside it, recreating the original signal.
A glass of port, a fortified wine. Fortified wine is a wine to which a distilled spirit, usually brandy, is added. Many different styles of fortified wine have been developed, including Port, Sherry, Madeira, Marsala, Commandaria wine, and the aromatized wine Vermouth.
By contrast, fortified wines such as port or sherry can last several weeks or more; the higher the alcohol content, the longer the life of the wine. Wine lifespan varies depending on the acidity of the wine; a high-acidity wine such as a Riesling or Sauvignon Blanc will survive a little longer than a lower-acidity wine such as a Pinot Grigio.