What is the meaning of f3.5 in a camer lens?

The f3.5 in a camera lens refers to the aperture setting, which indicates the size of the lens opening through which light passes. A lower f-number (like f3.5) means a wider aperture, allowing more light to reach the camera sensor, which is beneficial in low-light conditions and helps create a shallow depth of field for blurred backgrounds. Conversely, a higher f-number results in a smaller aperture, reducing light intake and increasing depth of field.