1. Electromagnetic radiation is produced by regularly repeating changes in ___________ and
_____________ fields.
2. _______________ is the distance between two successive wave crests.
3. The shorter the wavelength, the ___________ the frequency.
4. The amount of energy propagated from a source decreases proportionally to the ___________
of the distance from the source.
4. The range of frequencies in the electromagnetic spectrum that are just below (lower in
frequency than) the visible range is called ____________.
4. Radio wavelengths are in the (longest/shortest) ___________ range of the electromagnetic
spectrum.
4. In the visible light range, the __________ end of the spectrum has higher frequencies than the
________ end of the spectrum.
4. The linear polarization of an electromagnetic wave is defined by the direction of its
______________ vector.
4. The GAVRT can observe S- and X-band radio waves, which includes frequencies of ____ to
____ and ____ to _____ GHz, respectively.
1. electric, magnetic 2. wavelength 3. higher 4. square 5. infrared 6. longest 7. blue, red 8. electric 9. 2-4, 8-12
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