No, light cannot observe itself. Observation generally refers to the act of perceiving or detecting something using a conscious entity or an instrument. Light itself is not conscious and does not possess the ability to observe or perceive.
Light, as electromagnetic radiation, can interact with other objects and be detected or measured by instruments or organisms with the ability to detect light. For example, our eyes are capable of detecting and perceiving light within the visible spectrum. Instruments like cameras or light detectors can also detect and measure light.
However, it is important to note that the act of observation typically requires a conscious observer or an instrument designed for detection. Light itself does not possess consciousness or the ability to observe or perceive.