Science ObjectDigital resources are stored online in your NSTA Library.
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the final of four Science Objects in the Nature of Light SciPack. It provides an understanding of how sometimes the nature and behavior of electromagnetic radiation such as light can be best described using a wave model, but at other times it can be best described by using a particle model. Particles of light called photons contain discrete amounts of energy. The energy that a photon carries is directly proportional to its frequency. The energy of a photon is inversely proportional to the wavelength of the electromagnetic radiation. Each kind of atom or molecule can only gain or lose energy only in discrete amounts so they can absorb and emit light only at frequencies and wavelengths corresponding to these amounts. These combinations of wavelengths or spectra can be used to identify the substance.