Freebase(0.00 / 0 votes)Rate this definition: Derived demand is a term in economics, where demand for a factor of production or intermediate good occurs as a result of the demand for another intermediate or final good.
10 best places to see this summerâs solar eclipse. On August 21st, a total solar eclipse will be visible to mainland America. Find out why it is drawing giddy excitement from the public, as well as astronomy gurus. On Aug. 21, a swath of the USA will plunge into darkness during a continent-wide total solar eclipse.
A total solar eclipse occurs when the Moon completely covers the Sun, as seen from Earth. Totality during such an eclipse can only be seen from a very small area on Earth. This area is usually about 100 miles (160 kms) wide and 10,000 miles (16,100 kms) long. Areas outside this track may be able to see a partial eclipse of the Sun.