Full formScience
UVBstands forUltraviolet B
Full Form of UVB
What is UVB?
UVB refers to a specific band of ultraviolet radiation emitted by the sun, with wavelengths ranging from 280 to 315 nanometres. It sits between the more harmful UVC rays, which are absorbed entirely by the ozone layer, and the longer-wavelength UVA rays that penetrate deeper into the skin. UVB radiation is partially absorbed by the ozone layer, but a significant portion still reaches the Earth's surface, making it biologically important. In India, UVB exposure is particularly intense due to the country's tropical location, proximity to the equator, and abundant sunshine throughout the year, which is why dermatologists frequently warn about its effects on the skin. UVB is the primary cause of sunburn, skin tanning, and plays a major role in the development of skin cancers including melanoma and carcinoma. However, it also has beneficial effects, such as stimulating the production of vitamin D3 in human skin, which is crucial for bone health and immunity. UVB is used in controlled phototherapy to treat conditions like psoriasis, vitiligo, and eczema. For competitive exams, UVB is frequently mentioned in General Science, Biology, and Environmental Science sections of UPSC, NEET, and SSC examinations.
UVB का फुल फॉर्म
पराबैंगनी बी विकिरण
Example
Indian dermatologists recommend using a broad-spectrum sunscreen with at least SPF 30 to protect the skin from harmful UVB radiation, especially during the harsh summer months from March to June.
UVB — frequently asked questions
What is the full form of UVB?
UVB stands for Ultraviolet B, which is a band of ultraviolet radiation from the sun with wavelengths between 280 and 315 nanometres.
What is the difference between UVA and UVB rays?
UVA has longer wavelengths and penetrates deeper into the skin causing premature ageing, while UVB has shorter wavelengths and primarily causes sunburn, tanning, and contributes to skin cancer.
Is UVB radiation harmful in India?
Yes, due to India's tropical location, high altitude regions, and intense year-round sun exposure, UVB levels are significantly high, making sun protection essential for skin health.