Chapter 1 Section 7
Terms in this set (15)
an instrument consisting of, at a minimum, a slit and grating (or prism) that produces a spectrum for visual observation.
the range of frequencies of electromagnetic radiation.
the science that studies the way light interacts with matter.
the energy transmitted through space by electric and magnetic fields that are regularly moving back and forth.
It travels at 3 × 108 m/s in a vacuum and includes (in order of increasing energy) radio, infrared, visible light (optical), ultraviolet, X-rays, and gamma rays.
part of the electromagnetic spectrum that is detectable by human eyes. The wavelengths range from 400 to 700 nanometers (nm).
electromagnetic radiation at wavelengths shorter than the violet end of visible light, with wavelengths ranging from 5 to 400 nm.
electromagnetic radiation with wavelengths between about 0.7 to 1000 µm. Infrared waves are not visible to the human eye.
an instrument used to observe longer wavelengths of
radiation (radio waves), with large dishes to collect and concentrate the radiation onto antennae.
X- ray telescope
an instrument used to detect stellar and interstellar X-ray
emissions. Because Earth's atmosphere absorbs X-rays, these telescopes are placed high above Earth's surface.
a theoretical object which is both a perfect absorber and
emitter of radiation.
the wavelength of electromagnetic radiation with the most electromagnetic energy emitted by any object.
a theoretical temperature of 0 K (zero kelvin) at which there is no apparent molecular motion.
a chart of the entire range of wavelengths of light from an object.
a spectrum containing bright lines or a set of discrete wavelengths produced by an element. Each element has its own unique emission spectrum.
a continuous spectrum interrupted by absorption lines.