How many spectral lines does mercury have?
How many spectral lines does mercury have?
Four visible
Four visible spectral lines of mercury are depicted in Fig. 2. The accepted values of their wavelengths and color associations are summarized in Table 1. To determine the wavelengths of these spectral lines proceed as follows.
Is mercury lamp a line spectrum?
There is a substantial number of standard spectral lines of mercury, which can be produced with mercury-based spectral lamps; typical wavelengths are 184.5 nm, 253.7 nm, 365.4 nm, 404.7 nm, 435.8 nm, 546.1 nm, 578.2 nm and 1014 nm….
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What type of spectrum is produced by an Hg lamp?
Line spectrum of mercury vapor. The blue-green tint of mercury vapor lamps is caused by the strong violet and green lines….Emission line spectrum.
| Wavelength (nm) | Name (see photoresist) | Color |
|---|---|---|
| 253.7 | ultraviolet (UVC) | |
| 365.4 | I-line | ultraviolet (UVA) |
| 404.7 | H-line | violet |
| 435.8 | G-line | blue |
What is the principle of functioning of a mercury lamp?
Definition: A lamp that consists of vaporized mercury to generate light by using an electric arc is known as a mercury vapor lamp. Basically, this lamp discharges gas when heated or cooled. The mercury which is present inside the tube is in liquid form (at room temperature) which is ionized before generating light.
What type of spectra does mercury have?
The wavelengths of the prominent lines in mercury are purple (405 nm), blue (436 nm), blue- green (492 nm), greenish yellow (546 nm), yellow (577 nm), orange (623 nm), and red (691 nm).
What is mercury spectrum?
Is mercury lamp monochromatic?
A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm.
How does a mercury lamp produce light?
They produce light when electric current passes between two electrodes (also called cathodes) in a tube filled with low-pressure mercury vapor and inert gases, such as argon and krypton. The electric current excites the mercury vapor in the tube, generating radiant energy, primarily in the ultraviolet (UV) range.
How many spectral lines does hydrogen have?
four
The light emitted by hydrogen atoms is red because, of its four characteristic lines, the most intense line in its spectrum is in the red portion of the visible spectrum, at 656 nm.
What is the wavelength of mercury lamp?
Mercury arc lamps also have a significant number of spectral lines in the ultraviolet region between 250 and 350 nanometers and several lesser lines in the infrared wavelengths exceeding 1000 nanometers.
Why is mercury lamp used in spectrometer?
Low-pressure mercury lamps are available in versions that use the emitted ultraviolet lights directly, or as so-called fluorescent lamps that use a fluorescent material to convert the wavelength to a different wavelength. A spectrophotometer uses the mercury emission lines to calibrate the displayed wavelength values.
