Describe emission spectra.
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when a radiation emitted from some source for example from the sun or by passing electrical discharge through a gas at low pressure nd heating some substance at high temp. is passed directly through the prism nd then received on the photographic plate, the spectrum obtain is called emission spectrum.
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Answer:
The light emitted by a source of light and resolved into its constituent wavelengths is called emission spectrum.
When a solid is heated to incandescent stage, its atoms collide with each other randomly. Due to this, the orbital electrons in the atoms of the solid gets raised to higher energy levels. When the electrons return back, the radiation of wavelength corresponding to the difference of energies associated with the two levels is emitted. Usually the radiation emitted has more than one wavelength. When the emitted radiation is studied using the prism spectrometer, the constituent wavelengths of the emitted radiation are observed in a order of their wavelengths. Such a spectrum is called emission spectrum of the incandescent solid.
In addition to an incandescent solid, an arc discharge, a spark discharge, the discharge of electricity through a gas, a vapour lamp etc.
Emission spectra are of following three types:
1). Continuous emission spectra: A Continuous emission spectra is one, which covers a wide range of wavelengths without any gap or discontinuity.
2). Line emission spectra : A line emission spectra is one, which consists of bright lines separated from each other by dark spaces.
3). Band emission spectra : A band emission spectra is one, which consists of a number of bright bands of light, Sharp at one end and fading off at the other end.
#Be Brainly.
Answer:
The light emitted by a source of light and resolved into its constituent wavelengths is called emission spectrum.
When a solid is heated to incandescent stage, its atoms collide with each other randomly. Due to this, the orbital electrons in the atoms of the solid gets raised to higher energy levels. When the electrons return back, the radiation of wavelength corresponding to the difference of energies associated with the two levels is emitted. Usually the radiation emitted has more than one wavelength. When the emitted radiation is studied using the prism spectrometer, the constituent wavelengths of the emitted radiation are observed in a order of their wavelengths. Such a spectrum is called emission spectrum of the incandescent solid.
In addition to an incandescent solid, an arc discharge, a spark discharge, the discharge of electricity through a gas, a vapour lamp etc.
Emission spectra are of following three types:
1). Continuous emission spectra: A Continuous emission spectra is one, which covers a wide range of wavelengths without any gap or discontinuity.
2). Line emission spectra : A line emission spectra is one, which consists of bright lines separated from each other by dark spaces.
3). Band emission spectra : A band emission spectra is one, which consists of a number of bright bands of light, Sharp at one end and fading off at the other end.
#Be Brainly.
Inflameroftheancient:
Great answer !
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