Visible light is the small part within the electromagnetic spectrum that human eyes are sensitive to and can detect. Visible light waves consist of different wavelengths.
the western or westward expansion carried slavery into the Southwest, into states such as Mississippi, Alabama and into Louisiana. It also poured into Texas by the 1840's.
Good climate and ample food supply
The environment of the west coast was attractive for settlement because it had great weather and plentiful natural resources. The climate of the west coast was mild and it had dependable food that attracted the Native Americans
<span>transports first of all, to make trade easier: more highways, especially the one connecting to other countries. And new, bigger and more efficient airports, both for tourism and commerce. Oher structures that have been made more modern and functional are for example hotels, to guest more people.</span>