Step 1: Understanding the Concept:
The question asks to identify the author of the play Raja, also known by its English title, The King of the Dark Chamber.
Step 2: Detailed Explanation:
Raja (1910) is a significant allegorical play by the Nobel Prize-winning Bengali writer Rabindranath Tagore. The play explores themes of spiritual truth versus superficial appearance through the story of a queen who longs to see her king, who remains unseen in a dark chamber. The play was translated into English by Tagore himself and gained international acclaim.
Step 3: Final Answer:
The play The King of the Dark Chamber (Raja) was written by Rabindranath Tagore.