The Quantum-Mechanical Model of the Atom Flashcards
What is the speed of light?
3.00 x 10^8 m/s
What is electromagnetic radiation?
A wave comprising oscillating electric and magnetic fields that are perpendicular within their planes
What is amplitude?
The height of a wave (distance for node to crest or node to trough)
What is wavelength (λ or lamda)?
A measure of distance covered by a wave (the distance from one crest to the next, one trough to the next, or between alternate nodes)
What does wavelength of light determine? Is it intensive or extensive?
Color, intensive
What does the amplitude, or intensity, of light determine? Is it intensive or extensive?
Brightness, extensive
What is frequency (v or nu) of a wave?
The number of waves that pass a point in a given period of time (measured in Hertz)
What is total energy (E) of a wave?
Total energy is proportional to the amplitude of the waves and their frequency
Visible light comprises only a small fraction of all wavelength of light, called the _______________ ________.
Electromagnetic spectrum
What is constructive interference? What is destructive interference?
Waves that interact so that they add to make a larger wave (in phase); waves that interact so they cancel each other (out of phase)
What is diffraction?
The interference or bending of waves around the corners of an obstacle or through a slit
What is the photoelectric effect?
The emission of electrons when electromagnetic radiation such as light hits a material
What is threshold frequency?
The minimum frequency that was needed before electrons would be emitted (regardless of the intensity)
What is a photon/quanta?
An elementary particle of light
What is an emission spectrum?
The spectrum of frequencies of electromagnetic radiation emitted when light is passed through a prism
