Exposure can refer to:

In biology:

• A condition of poor health or death resulting from lack of protection over prolonged periods under weather, extreme temperatures or dangerous substances (see also: hypothermia, hyperthermia, radioactive contamination, radiation poisoning)
• Acute exposure, the exposure to a toxic substance which may result in harm or death
• Post-exposure prophylaxis, any treatment started immediately after exposure to a disease
• Children's Environmental Exposure Research Study, an EPA study regarding children's exposure to pesticides and other chemicals in U.S. households

In photography:

• Exposure (photography), the total amount of light allowed to fall on the sensor during the taking of a photograph
• Exposure value, a value given to all combinations of camera shutter speed and aperture that gives the same exposure
• Exposure latitude, the range of light intensities that a camera can capture. About 11 F-stops for regular film.
• Multiple exposure, an exposure in which the sensitivity to light is reduced and then increased at least once during the total exposure time