As with other forms of electromagnetic radiation, X-rays can be described as coupled waves of electric and magnetic fields traveling at the speed of light (about 300,000 km, or 186,000 miles, per second).
Lock Haven, Pennsylvania. The city of Lock Haven is the county seat of Clinton County, in the U.S. state of Pennsylvania. Located near the confluence of the West Branch Susquehanna River and Bald Eagle Creek, it is the principal city of the Lock Haven Micropolitan Statistical Area, itself part of the WilliamsportâLock Haven combined statistical area.
Easton is a city in and the county seat of Northampton County, Pennsylvania, United States. The city's population was 26,800 as of the 2010 census. Easton is located at the confluence of the Delaware River and the Lehigh River, roughly 55 miles (89 km) north of Philadelphia and 70 miles (110 km) west of New York City. Easton is the easternmost city in the Lehigh Valley, a region of 731 square miles (1,893 kmÂ²) that is home to more than 800,000 people.