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View Resource 'Metafilms' Can Shrink Radio, Radar Devices

This is an article published on March 23, 2008. It describes that recent research at the National Institute of Standards and Technology (NIST) has demonstrated that thin films made of "metamaterials"--manmade composites engineered to offer strange combinations of electromagnetic properties--can reduce the size of resonating circuits that generate microwaves. The work is a step forward in the...

View Resource Electromagnetic Radiation: On Trial

This activity introduces students to the properties of electromagnetic radiation in a variety of ways. For example, they put the different types of the electromagnetic radiation on trial, selecting the judge, prosecutor, defense counsel, and jury, and learning about electromagnetic energy by arguing the pros and cons of each wavelength. During this activity, students are introduced to the general...

View Resource Introduction to Spectroscopy

Even though it is said to be a complex art, spectroscopy can be very useful in helping scientists understand how an object like a black hole, neutron star, or active galaxy is producing light, how fast it is moving, and even what elements it is made of. From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star. Emission lines...

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