why do atoms emit a definite line spectrum of only certain energies?
The production of line spectra by the atoms of an element indicate that an atom can radiate only a certain amount of energy. This leads to the conclusion that bound electrons cannot have just any amount of energy but only a certain amount of energy.
Why does the Rydberg equation only work for hydrogen? The Rydberg equation only works for the Hydrogen and Hydrogen-like (species with only one electron) however because Bohr model of the atom breaks down when there are more than two electrons. A more sophisticated theory of the atom was needed in order to determine the energy due to electron-electron repulsion.
why the emission spectrum of hydrogen only consists of particular wavelengths of light?
Though a hydrogen atom has only one electron, it contains a large number of shells, so when this single electron jumps from one shell to another, a photon is emitted, and the energy difference of the shells causes different wavelengths to be released hence, mono-electronic hydrogen has many spectral lines.
What determines the intensity of light in the photon description?
of photons per unit volume at a given point determines the intensity of light in the photon picture of light. The intensity of a particle(Photon, quantum of energy) is defined as the flux of no. of particles per second(means no. of photons passing per area per time).
why do atoms emit or absorb light of specific wavelengths?
Explanation: The electrons in an atom can only occupy certain allowed energy levels. Only certain energy levels are allowed, so only certain transitions are possible and hence specific wavelengths are emitted when an electron drops to a lower energy level.
How do atoms give off light?
Light is the result of electrons moving between defined energy levels in an atom, called shells. When something excites an atom, such as a collision with another atom or a chemical electron, an electron may absorb the energy, boosting it up to a higher-level shell.
What are the wavelengths of the lines in the hydrogen emission spectrum?
Emission Spectrum of Hydrogen
What do absorption lines tell us?
As photons fly through the outermost layers of the stellar atmosphere, however, they may be absorbed by atoms or ions in those outer layers. The absorption lines produced by these outermost layers of the star tell us a lot about the chemical compositition, temperature, and other features of the star.
How do you tell if a photon is emitted or absorbed?
The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy. Only a photon with an energy of exactly 10.2 eV can be absorbed or emitted when the electron jumps between the n = 1 and n = 2 energy levels. l = hc/E.
How are specific wavelengths of light produced by moving electrons?
A larger jump to a lower energy level, will produce a photon with greater energy (smaller wavelength). The atom produces light of certain wavelengths. An absorption line is produced when a photon of just the right energy is absorbed by an atom, kicking an electron to a higher energy orbit.
What are absorption lines?
An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer. This material could be the outer layers of a star, a cloud of interstellar gas or a cloud of dust. Absorption lines are usually seen as dark lines, or lines of reduced intensity, on a continuous spectrum.
How can you use the emission spectrum of an element to identify it?
Each natural element has a characteristic light spectrum that helps identify it in samples of unknown substances. Spectroscopy is the practice of examining spectra and comparing them to those of known elements. Using spectroscopy methods, scientists can identify pure substances or compounds and the elements in them.
Why do different elements emit different colors of light?
Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours.
What is an example of a line spectrum?
atoms is known as a line spectrum, because the radiation (light) emitted consists of a series of sharp lines. The wavelengths of the lines are characteristic of the element and may form extremely complex patterns. The simplest spectra are those of atomic hydrogen and the alkali atoms (e.g., lithium, sodium,…