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.
On Sunday, Jan. 26, the cost to mail a first-class single-piece letter jumped from 46 cents to 49 cents. The U.S. Post Office's 3-cent increase is the largest hike for consumer postage in more than a decade.The cost of mailing a postcard will also go up to 34 cents, a 1-cent increase.The announcement of the increase in postage rates came Dec. 30. The increase will help the budget deficit that the USPS has been dealing with in recent years.he cost of mailing a postcard will also go up to 34 cents, a 1-cent increase. The announcement of the increase in postage rates came Dec. 30. The increase will help the budget deficit that the USPS has been dealing with in recent years.