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 postcard is a rectangular mailer sent without an envelope. Sending a postcard is an extremely affordable way to communicate when youâre using the U.S Postal Serviceâregular postcards cost only $0.35 to mail!hen you combine the ease of sending postcards with the convenience of Stamps.com, youâll reap a wealth of benefits. If youâve already printed or purchased your postcards, Stamps.com allows you to print $0.35 NetStamps that easily fit on your postcards from the comfort of your own home or office.