The red wavelengths of light are the longer wavelengths and the violet wavelengths of light are the shorter wavelengths. Between red and violet, there is a continuous range or spectrum of wavelengths.
The USPS also includes that a large postcard is 49 cents to mail. The maximum size for this postcard is 11 1/2 inches long, 6 1/8 inches high and 1/4 inch thick. This is the same rate to mail a First Class 1 ounce letter domestically. The rates for postage increased as of January 2014.
A: As of May 2014, the United States Postal Service charges 34 cents to send a typically sized postcard to a recipient in the United States. For larger postcards, the rate is 49 cents, and for recipients in other countries, the rate is $1.15.