It is noted that UVA possesses a l.ong wavelength than UVB. For the commercial tanning salons, UVA is quite used. For the treatment of Vitiligo, UVA is quite ineffective unless the doctors also treat the patients with photosensitizing treatment like psoralen. The combination, which is often in use, of psoralen and UVA light is termed as PUVA that stands for Psoralen and UVA light. Since UVB is more effective than UVA, doctors widely use it.
The Difference between UVA and UVB
The Difference between UVA and UVB
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