Final answer:
Claudius calls for more light to escape the emotional discomfort caused by a play that mirrors his own guilt, a literary motif where light represents truth and knowledge.
Step-by-step explanation:
Claudius' demand for more light during the play within the play in Shakespeare's Hamlet is a response to the psychological and emotional discomfort he experiences as the performance mirrors his own heinous actions. The metaphorical light in literature often symbolizes truth and knowledge. In this context, calling for physical light can be seen as an attempt to escape the revelation of truth, as Claudius' guilt is illuminated by the plot of the play. This mirrors the use of light as a symbol in various literary texts, where characters seek or shun light based on their comfort with the truth it represents.