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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Answer:
false
Explanation:
the Dark Ages of Greece the old major settlements were abandoned (with the notable exception of Athens), and the population dropped dramatically in numbers.
Answer: Gold, silver, and furs attracted European exploration, colonization, and competition in the New World.
Explanation:
As a response to the National Bank issue during Jackson’s presidency, Henry Clay "suggested shifting funds to state banks" since he feared that federal banks would have too much power.
Answer:
Option: A. Managed care
Explanation:
Managed-care plans are a type of health insurance. Managed Care is a care system designed to control cost, service, and quality. It provides care for beneficiaries at reduced costs. Some of the examples of health care include Health Maintenance Organization, Preferred Provider Organization, and Point of Service. The managed care used in the United States meant to lessen the cost of pf health care and provide health insurance.
