0
What do you now know to be the basis for the observations that Henry Moseley made about the pattern of Xray frequencies emitted from elements?
Wiki User
∙ 10y ago
It is related to the number of protons in the nucleus.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How did Moseley establish a more accurate periodic table?
Moseley discovered a relation berween the atomic number and the wavelength of X-rays emitted by an element.
What are Frequencies of light emitted by an element called?
"Spectrogram" is a word used to describe the set of specific characteristic frequencies of light which are emitted by a given chemical element when it is sufficiently excited by heat or by some other means.Alternatively, a scientific technique known as "spectroscopy" can be used to identify the elements in some matter of unknown composition and also the emission spectra of molecules can be used in chemical analysis of substances.Because each element's emission spectrum is unique, the "emission spectrum" of a chemical element or chemical compound can be used to help identify what it is. The "emission spectrum" is the name given to the relative intensity of each frequency of electromagnetic radiation http://www.answers.com/topic/emission-spectrum by the element's atoms or a compound's molecules when they are returned to a ground state.
Why do you think are there colors emitted?
There different colors emitted
If Cathode rays emitted by a piece of silver and a piece of copper illustrate identical properties What is the significance of this observation?
The particle given off must be common in all elements.
Why do you think are there different color emitted?
There different colors emitted
How did Moseley establish a more accurate periodic table?
Moseley discovered a relation berween the atomic number and the wavelength of X-rays emitted by an element.
What wavelenghts are used to study star's?
To make a long story short, all of them. Various properties of starts can be studied by measuring the frequencies and corresponding intensities of electromagnetic radiation from a star. Assuming a star is not moving with respect to the Earth (or, put more simply, is moving as fast as the Earth is and in the same direction), the intensities of the wavelengths emitted by the star can be seen from Earth as having a bell curve distribution whose peak corresponds with the star's temperature. However, this bell curve distribution is not perfect. At several specific frequencies, the intensity of emitted light is greatly decreased. The frequencies influenced by this effect and the degree that this effect occurs are dependent on the component elements and corresponding concentrations of these elements. Therefore, by analyzing the frequencies that are "missing" from the electromagnetic spectrum, one can derive the chemical composition of the star. If the star is moving with respect to the Earth, this distribution of light is distorted even more. As a consequence of relativistic physics, the wavelengths of light emitted from the star will appear to have a higher frequency as seen from the Earth than what was emitted if the star is moving toward the Earth (this is called "blue shift", as visible colors appear more blue). Conversely, the Earth will see lower frequencies of light than were originally emitted if the star is moving away from the Earth (this is called "red shift", as visible colors appear more red). However, since the distribution of light emitted from the star has "missing" frequencies, and since the original emitted frequencies are known for these "missing" frequencies (as they correspond with the frequencies emitted by known compounds), the entire distribution of light can be shifted back to its rightful place. Moreover, the amount of this shift is dependent of the relative speed between the Earth and the star; therefore, the star's speed can be determined from the star's light as well.
What is the difference between waves emitted by the sun and terrestrial wave emissions?
the same except for their frequencies and wavelengths
What was The quantum theory of energy levels within atoms was aided by?
The quantum theory of energy levels within atoms was aided by the emission spectrum. When excited with light, different elements emitted photons of different frequencies. The frequencies were different because the energy difference from excited to low energy state was different depending on the element.
How is light emitted from elements useful to scientists?
Elements, such a yttrium, have helped to create the lights that are used in televisions
Why spontaneous emission is incoherent?
During spontaneous emission, photons are emitted randomly and hence they will not in phase with each other. such light is irregular and mixed of different frequencies,direction and duration.therefore the beam of light emitted is incoherent.sudhir tiwari.sharda university
We are able to see an object when it emits or reflects one or more visible light frequencies?
true
Why do the elements such as radium polonium and uranium expose photographic film?
Because radiations emitted by radioactive elements decompose the components of the emulsion (AgBr).
What is the natural emitted frequency (Fe) of the Earth?
There is no such (single) frequency. The Earth is not a resonator, but it does vibrate mechanically (seismic and tidal) and emit electromagnetic radiation at many different frequencies.
What is the frequency of an EMP emitted from a high altitude nuclear explosion?
No single frequency, it is a wide bandwidth pulse that can contain frequencies well below the AM radio band into the high microwave band.
Working principle of atomic emission spectroscopy?
An emission spectrum is the spectrum of frequencies of the electromagnetic radiation emitted (by an atom or molecule) during a transition from a high energy to a low energy level.
What measurement would you use to measure a stars elemental composition?
If you want to know the elemental composition of a star, you look for the elements' fingerprints. These are in the form of line spectra, since each element has its own particular set of spectral lines. Atoms in the star's atmosphere will absorb their characteristic frequencies from the cavity radiation emitted from the star due to its temperature. Color
