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.
The price of a postcard stamp will fall to 34 cents, down 1 cent. International mail will fall to $1.15 from $1.20. The change will hurt people who had collected âForever stamps,â which take on the value of the current postage rate no matter how much they cost when they were purchased.