Normal Skin Care Sun Protection
They are rays of 200 - 400 nm. sunlight Beams of 200 to 400 nm Rates of reaching the earth 0.3% - 6.8% 75% between 10: 00-15: 00 Most busy 11:00 - 13:00 The effects of the sun Vitamin D synthesis Occurs with UVB effect Help protect from skin cancer Over-exposure problem !!!!! Increases melanin formation in skin Has a positive effect on psychology Ultraviolet rays UVC = 200 - 290 nm UVB = 290 - 320 nm UVA = 320 - 400 nm UVC Does not reach the earth is carcinogenic 15-20 years of ozone depletion is important Germs kill Used in sterilization Creates redness Does not cause stain UVB Increases melanin pigment Creates darkening Responsible for sunburn 0.3 - 0.5% of the rays reaching the earth Causes DNA damage The effect of UVB is 600-1000 times higher than gunesvederi009UVA Biologically the most active and potentially harmful type of beam Causes cancer ...