The correct answer is A. 0.1 to 0.28.
Ultraviolet radiation is a type of electromagnetic radiation with a wavelength shorter than that of visible light. It is divided into three bands: UVA, UVB, and UVC. UVA radiation has the longest wavelength and is the most common type of UV radiation. UVB radiation has a shorter wavelength than UVA radiation and is responsible for sunburn. UVC radiation has the shortest wavelength and is the most harmful type of UV radiation, but it is mostly absorbed by the ozone layer.
UV radiation can cause a variety of health problems, including skin cancer, cataracts, and immune system suppression. It can also damage DNA and cause mutations.
The amount of UV radiation that reaches the Earth’s surface varies depending on the time of day, the season, and the location. UV radiation is strongest at noon and weakest at dawn and dusk. It is also strongest in the summer and weakest in the winter. UV radiation is higher at higher altitudes and closer to the equator.
People can protect themselves from UV radiation by wearing sunscreen, sunglasses, and protective clothing. They should also avoid being in the sun during the middle of the day, when UV radiation is strongest.
Option B, 0.28-0.32, is incorrect because this range of wavelengths corresponds to UVB radiation. UVB radiation is responsible for sunburn and can cause a variety of health problems, including skin cancer.
Option C, 0.32-0.4, is incorrect because this range of wavelengths corresponds to UVA radiation. UVA radiation is the most common type of UV radiation and can cause a variety of health problems, including skin cancer.
Option D, 0.4-0.5, is incorrect because this range of wavelengths corresponds to visible light. Visible light is not harmful to humans.