Suppose It Were Possible to Lower a Yellow Sodium Lamp

question 115

Multiple Choice

Suppose it were possible to lower a yellow sodium lamp toward the event horizon of a black hole. What would an observer see while watching from a safe distance?

• A) The brightness and color would each remain unchanged.
• B) The light from the lamp would change to orange and then red.
• C) The light would remain yellow, but there would be fewer and fewer photons being emitted from it.
• D) The light from the lamp would change to green and then blue.