Question: (1b) Assume that there is light shining through an open door into a dark room. For light, we expect to see a sharp shadow of

(1b) Assume that there is light shining through an open door into a dark room. For light, we expect to see a sharp shadow of the doorway on the floor of the room, and we expect no light to bend around corners into other parts of the room. When sound passes through a door, we expect to hear it everywhere in the room. Explain why this is so. You may wish to make a drawing. [4]

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