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A luminous source that produces a line spectrum is typically a gas or plasma that emits light at specific wavelengths due to electronic transitions between energy levels in atoms or molecules. Examples include neon lights and gas discharge tubes, where the gas is excited by an electric current, causing it to emit light in discrete lines characteristic of the elements present. Each line corresponds to a specific wavelength, resulting in a unique spectral fingerprint for that element.
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Is an absorption spectrum also called a bright line spectrum?
No, an absorption spectrum and a bright line spectrum are not the same. An absorption spectrum is produced when light is absorbed by atoms or molecules, showing dark lines at specific wavelengths. On the other hand, a bright line spectrum is produced when atoms or molecules emit light at specific wavelengths, creating bright lines in the spectrum.
Who discovered the dark line spectrum?
The dark line spectrum was first observed by Joseph von Fraunhofer in 1814 during his study of the Sun's spectrum. These dark lines are now known as Fraunhofer lines and are caused by absorption of specific wavelengths of light by various elements in the Sun's atmosphere.
What type of spectrum does the Sun's photosphere produce?
Visible light is a portion of the electromagnetic radiation that is visible to the human eye. Stars Emit their own light. visible Light has a Wavelength of around 80 or 400 nm to about 760 or 780 nm
How do we see luminous objects?
We can see non-luminous objects because the light reflect off the object and into our eyes that's why at night you can only see a faint out line of the objects around you
Line spectrum of water vapor?
The line spectrum of water vapor consists of distinct spectral lines corresponding to the specific wavelengths of light absorbed or emitted by water molecules. These lines arise from electronic, vibrational, and rotational transitions within the molecules. The spectrum is typically observed in the infrared region, as water vapor has strong absorptive features in this range due to its molecular structure. This spectrum is important for understanding atmospheric processes and the greenhouse effect.
What are two examples of a luminous source that produces a line spectrum?
1. Glow discharge lamp 2. Electrode discharge in spectrometry
What does the term bright line spectrum mean?
A bright line spectrum refers to the pattern of distinct and bright lines of different colors that are produced when an element is excited and emits light. Each element has a unique bright line spectrum that can be used to identify the element through spectroscopy.
What does a dark line in a spectrum mean?
A dark line in a spectrum, also known as an absorption line, represents a specific wavelength of light that has been absorbed by a substance between the source of light and the observer. The presence of dark lines in a spectrum can provide information about the composition and properties of the absorbing material.
What is the second longest wavelength in the absorption spectrum of hydrogen?
The second longest wavelength in the absorption spectrum of hydrogen corresponds to the transition from the n=2 to n=4 energy levels. This transition produces a spectral line known as the H-alpha line, which falls in the red part of the visible spectrum at a wavelength of 656.3 nm.
What is unique about the spectrum obtained for a fluorescent light?
The spectrum obtained for a fluorescent light is unique in that it produces a discrete line spectrum with distinct peaks at specific wavelengths, rather than a continuous spectrum. This is due to the combination of the phosphor coating in the tube and the mercury vapor emitting specific wavelengths of light when excited.
Is an absorption spectrum also called a bright line spectrum?
No, an absorption spectrum and a bright line spectrum are not the same. An absorption spectrum is produced when light is absorbed by atoms or molecules, showing dark lines at specific wavelengths. On the other hand, a bright line spectrum is produced when atoms or molecules emit light at specific wavelengths, creating bright lines in the spectrum.
How do we see non -luminous objects?
We can see non-luminous objects because the light reflect off the object and into our eyes that's why at night you can only see a faint out line of the objects around you
Continuous spectrum with dark lines where light is absorbed?
dark-line spectrum...
What is the use of short luminous line in a magnetic compass?
The short luminous line in a magnetic compass, also known as the lubber line, helps the user accurately read the heading or direction the compass is pointing. By aligning this line with the desired direction or heading, users can navigate more effectively.
What Causes a line in a line spectrum?
Wavelengths of absorbed or emitted photons Every line in a line spectrum is caused by a transition, from one quantum state to another quantum state, involving electrons.
What is a dark line found in a spectrum is called?
A dark line found in a spectrum is called an absorption line. Absorption lines are created when atoms or molecules absorb specific wavelengths of light, resulting in dark lines in the spectrum where that light is missing.
What causes lines in a line spectrum?
Wavelengths of absorbed or emitted photons Every line in a line spectrum is caused by a transition, from one quantum state to another quantum state, involving electrons.
