Final answer:
Many people possess solar cells in calculators and cameras with light meters that use the photoelectric effect to convert light into electricity.
Step-by-step explanation:
One common object many people possess that uses the photoelectric effect is the solar cell, often found in calculators. This effect occurs when light photons hit a material, causing the ejection of electrons and thereby generating an electrical current. Solar cells on calculators, rooftops, or roadside signs harness this effect to convert sunlight into electricity. Additionally, light meters in cameras that automatically adjust the iris are another example of a device that employs the photoelectric effect for its operation. The photoelectric effect is a phenomenon where light striking certain materials can eject electrons from them, producing electricity. Many people possess devices that use the photoelectric effect, such as light meters found in cameras and solar cells used for converting light into electricity for various devices.