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.
First Class Letters & Postcards â International The cost to send a one ounce First Class Letter to an international destination will increase five cents, to $1.20 from $1.15. Postcard rates will increase by five cents, to $1.20 from $1.15 in 2014.irst Class Letters & Postcards â International The cost to send a one ounce First Class Letter to an international destination will increase five cents, to $1.20 from $1.15. Postcard rates will increase by five cents, to $1.20 from $1.15 in 2014.