Podcast
Questions and Answers
What is the typical voltage range of high-voltage lamps?
What is the typical voltage range of high-voltage lamps?
- About 10-30 atm
- About 2500 volt (correct)
- About 0.2-5 mm
- About 40 volt
What is the upper limit of usefulness for hydrogen lamps?
What is the upper limit of usefulness for hydrogen lamps?
- About 375 nm (correct)
- About 200 nm
- About 165 nm
- About 185 nm
What is the purpose of using quartz windows in hydrogen lamps?
What is the purpose of using quartz windows in hydrogen lamps?
- To increase the intensity of the lamp
- To absorb below 200 nm (correct)
- To absorb below 185 nm
- To block UV radiation
How does the intensity of a deuterium lamp compare to a hydrogen lamp?
How does the intensity of a deuterium lamp compare to a hydrogen lamp?
What is a challenge with using Xenon-discharge lamps?
What is a challenge with using Xenon-discharge lamps?
What is the advantage of Xenon-discharge lamps in the near ultraviolet region?
What is the advantage of Xenon-discharge lamps in the near ultraviolet region?
What is the effect of increasing the operating temperature above 3000K on the lamp's energy output?
What is the effect of increasing the operating temperature above 3000K on the lamp's energy output?
What is the purpose of a heating-absorbing filter in a lamp setup?
What is the purpose of a heating-absorbing filter in a lamp setup?
What is the relationship between the wavelength of maximum emission and the absolute temperature?
What is the relationship between the wavelength of maximum emission and the absolute temperature?
What type of spectra are emitted by electric-discharge sources at very low pressure of gases?
What type of spectra are emitted by electric-discharge sources at very low pressure of gases?
What is the common use of hydrogen-discharge lamps?
What is the common use of hydrogen-discharge lamps?
What is the cause of electronic, vibrational, and rotational excitation in electric-discharge sources?
What is the cause of electronic, vibrational, and rotational excitation in electric-discharge sources?
What makes the mercury arc a less suitable source for continuous spectral studies?
What makes the mercury arc a less suitable source for continuous spectral studies?
What is the primary function of sharp-cut filters?
What is the primary function of sharp-cut filters?
What is the purpose of the thin semitransparent film of metal in interference filters?
What is the purpose of the thin semitransparent film of metal in interference filters?
What is the relationship between the bandwidth of filters and the transmitted radiation?
What is the relationship between the bandwidth of filters and the transmitted radiation?
What is the range of wavelengths emitted by the mercury arc?
What is the range of wavelengths emitted by the mercury arc?
What is the material used in the inner layer of interference filters?
What is the material used in the inner layer of interference filters?
What is the main function of the entrance and exit slits in a monochromator?
What is the main function of the entrance and exit slits in a monochromator?
What is the primary reason why shorter wavelengths are refracted more than longer wavelengths in a prism?
What is the primary reason why shorter wavelengths are refracted more than longer wavelengths in a prism?
Which type of dispersing element is nonlinear in its dispersion?
Which type of dispersing element is nonlinear in its dispersion?
What is the primary advantage of using quartz or fused silica in the UV region?
What is the primary advantage of using quartz or fused silica in the UV region?
What is the purpose of rotating the prism in a monochromator?
What is the purpose of rotating the prism in a monochromator?
What is the region where a prism works most effectively?
What is the region where a prism works most effectively?
What is the primary reason why prisms and other optics in the IR region are made from large crystals of alkali or alkaline earth halides?
What is the primary reason why prisms and other optics in the IR region are made from large crystals of alkali or alkaline earth halides?
Which material is commonly used in instruments for the entire region from 2.5 to 15.4μ m (4000 to 650 cm-1)?
Which material is commonly used in instruments for the entire region from 2.5 to 15.4μ m (4000 to 650 cm-1)?
What is the primary function of the grooves on a diffraction grating?
What is the primary function of the grooves on a diffraction grating?
Why are diffraction gratings particularly well suited for the infrared region?
Why are diffraction gratings particularly well suited for the infrared region?
What is the process of creating replica gratings from an original grating?
What is the process of creating replica gratings from an original grating?
What is a limitation of using prisms in the IR region?
What is a limitation of using prisms in the IR region?
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