Concept
An instrument that photographs or maps spectra is a spectroscope.
The atomic spectrum.
Definition
Is a spectrum of frequencies of electromagnetic radiation emitted or absorbed during electron transition between energy levels within an atom.
○Consists of light waves which have a definite line and colour With intermediate wavelengths, such that they cannot be detected by a human eye.
○The spectra have no harmful effects on human.
Atomic spectrum is produced as the atom gain sufficient energy which causes the electron to be excited and jump from the lowest energy level.
This results into the atom being unstable, since they have to maintain the stability, therefore the electron return back to its ground state, this process is accompanied by the energy released in the form of radiation. These radiation have wavelength of definite colours and lines which can be detected by a
human eye.
Continuous Spectra:
Are spectra containing electromagnetic radiation of all possible frequencies over wide range of energies assuming no gaps between them. ○Theoretically light from the sun is a virtual example.
○Continuous spectra are colourless and have no definite lines because they contain very
short wave lengths which are not detected by an eye.
The continuous spectrum is recorded in a spectrographic plate as Shown below.
Examples of continuous spectra are white light viewed through prism and the rain bow.
Line spectrum:
Is a spectrum which consists of scattered definite lines.
These spectra
have very long wave length.
The spectrographic plate of line spectrum
Band Spectrum:
A spectrum which consists a group of definite lines usually
in small bands.
The spectrographic plate of band spectrum:
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A spectrum as used in science,(plural spectra) is a band of colours, as seen in a rainbow, produced from separation of the components of light through their different degrees of refraction according to their wavelength orders.
In other words Is a set of wavelengths that's characteristic of electromagnetic radiation emitted/ absorbed by a particular object, substance, atom or molecule.
○An instrument designed for visual observation of spectra is called a spectroscope.An instrument that photographs or maps spectra is a spectroscope.
The atomic spectrum.
Definition
Is a spectrum of frequencies of electromagnetic radiation emitted or absorbed during electron transition between energy levels within an atom.
○Consists of light waves which have a definite line and colour With intermediate wavelengths, such that they cannot be detected by a human eye.
○The spectra have no harmful effects on human.
Atomic spectrum is produced as the atom gain sufficient energy which causes the electron to be excited and jump from the lowest energy level.
This results into the atom being unstable, since they have to maintain the stability, therefore the electron return back to its ground state, this process is accompanied by the energy released in the form of radiation. These radiation have wavelength of definite colours and lines which can be detected by a
human eye.
Continuous Spectra:
Are spectra containing electromagnetic radiation of all possible frequencies over wide range of energies assuming no gaps between them. ○Theoretically light from the sun is a virtual example.
○Continuous spectra are colourless and have no definite lines because they contain very
short wave lengths which are not detected by an eye.
The continuous spectrum is recorded in a spectrographic plate as Shown below.
Line spectrum:
Is a spectrum which consists of scattered definite lines.
These spectra
have very long wave length.
The spectrographic plate of line spectrum
A spectrum which consists a group of definite lines usually
in small bands.
The spectrographic plate of band spectrum:
Back/Next
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