Set 4: Central Ideas (Advanced)
Explanation
PASSAGE
The following text describes the 'Event Horizon' of a black hole. The event horizon is the boundary defining the region of space around a black hole from which nothing—not even light—can escape. It is the point of no return. According to general relativity, gravity curves spacetime so severely here that all paths move effectively inward towards the singularity. To a distant observer, an object falling in would appear to slow down and fade away due to gravitational time dilation, never actually crossing the boundary.
How does an object crossing the event horizon appear to a distant observer?
Detailed Explanation
Choice C is correct. The text states: 'To a distant observer, an object... would appear to slow down and fade away... never actually crossing.'
Key Evidence:
• "appear to slow down and fade away"
• "never actually crossing"
Why others are wrong: A (Inaccurate), B (Inaccurate), D (Inaccurate).