16 Questions
What is the classification of vacuum UV radiation?
100-200 nm wavelength
Which region does Ultraviolet radiation (UVR) lie in the electromagnetic spectrum?
Between visible light and X-ray
Which part of the body are UVR radiations introduced through according to the text?
Hair follicles, subcutaneous tissue, and sebaceous glands
What is absorbed rapidly in air according to the text's classification of UVR?
Vacuum UV radiation
What is the purpose of Psoralen + UVA (PUVA) treatment?
Treating psoriasis
When is PUVA treatment typically conducted in relation to the patient taking psoralen?
Two hours after taking psoralen
At which level do UVA rays penetrate the skin?
Dermis level
What does erythema result from according to the information provided?
Dilatation of capillaries and arterioles
What is a key factor influencing the extent of reaction to UV rays?
UV wavelength and UV absorbed amount
What physiological effect is caused by UVR leading to reddening of the skin?
Erythema
Which of the following lamps is specifically mentioned for treating generalized skin conditions like acne and psoriasis?
Air-cooled medium pressure mercury lamp (Hanovia Alpine sun lamp)
What is the primary component within a mercury vapor lamp that produces ultraviolet radiation?
Mercury vapor
What is the primary reason for incorporating a cooling device into an ultraviolet lamp?
All of the above
What is the phenomenon that causes a reduction in the output of ultraviolet radiation from a mercury vapor lamp over time?
Tridymite formation
Which of the following cooling methods is mentioned in the text for ultraviolet lamps?
Both A and B
Based on the information provided, how often is it recommended to change the quartz tube in an ultraviolet lamp?
Every 1000 hours of exposure
Learn about the production of therapeutic ultraviolet radiation (UVR) using mercury vapor lamps in a quartz burner tube. Understand the role of argon gas, mercury, and electrons in generating UVR, along with the emission of visible light and infrared rays.
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