1. The people in wagons/horseback with regular clothing are the groups moving west. With them, they bring death/destruction.
2. They may be moving west for better job opportunities, freedom, or to explore.
3. The Native Americans and animals like bears/buffalo were already in the West. They are forced to flee, fight for their land, or even die.
4. The figure in the center of the painting is Lady Liberty. She may represent America as a whole + the way they brought their ideals, hopes, and technology to the West along with them.
5. John Gast likely did not believe that US expansion in the 1800s was justifiable b/c in this painting of his, he portrays some of the negative effects that American expansion had on several groups in the West. There is a pile of animal bones symbolizing death, and other animals, as well as Native Indians, can be seen running away from the people moving west, showing how American expansion caused many to leave their homes.
In contrast to mechanical waves, electromagnetic waves can travel without a medium. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.
James Clerk Maxwell, a Scottish scientist, created a scientific theory to explain electromagnetic waves in the 1860s and 1870s. He realized that electromagnetic waves can be created when magnetic and electrical fields combine together. He compiled this electricity-magnetism relationship into what are now known as "Maxwell's Equations."
German physicist Heinrich Hertz used Maxwell's theories to explain how radio waves are transmitted and received. In honour of Heinrich Hertz, the hertz, or one cycle per second, is the unit of radio wave frequency. Two issues were resolved by his radio wave experiment. First, he had proven that the speed of radio waves was the same as the speed of light, which was something Maxwell had only theorized.
This demonstrated how radio waves are a type of light. Second, Hertz discovered how to create electromagnetic waves by causing the electric and magnetic fields to separate from wires.
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Newspaper wanted to attract as many readers and advertisers as possible
Radiation its visible light that we see during the day.
