Sec. 14-3 & 4: Which of the following happens near (but outside) a black hole? photons speed up as they fall in towards the black hole objects are compressed in all directions time speeds up photons turn redder as they leave the vicinity of the black hole
Added by Guillermo L.
Close
Step 1
A black hole's immense gravity warps spacetime significantly. This warping affects both the speed of light (photons) and the passage of time. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 88 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Question 13 (1 point) You accidentally drop a probe (complete with running lights and a visible clock) near a black hole, and watch it fall in. Which of the following statements is NOT TRUE about what you would see? The probe would start to get stretched by tidal forces. The probe's clock would appear to slow down The lights on the probe would appear to change color, becoming redder The probe would start to heat up, eventually emitting X-ray radiation. Once inside the event horizon, you would see the probe stretched into a long strand of atoms - it would appear Spaghettified Question 14 (1 point) The central object in a _______is approximately the size of _______ and shines by _______ . black hole; a city; remnant heat planetary nebula; the Earth; remnant heat black hole; the Sun; nuclear fusion planetary nebula; a city; remnant heat neutron star; the Sun; nuclear fusion Question 15 (1 point) How do we know what happens at the event horizon of a black hole? We don't know for sure: we only know what to expect based on the predictions of general relativity. Astronomers have analyzed the light from matter within the event horizon of many black holes. Physicists have created miniature black holes in the lab. Astronomers have sent spacecraft through the event horizon of a nearby black hole. Astronomers have detected X rays from just inside the black holes' event horizons.
Sri K.
As a person approaches the Schwarzschild radius of a black hole, outside observers see all the processes of that person (their clocks, their heart rate, etc.) slowing down, and coming to a halt as they reach the Schwarzschild radius. (The person falling into the black hole sees their own processes unaffected.) But the speed of light is the same everywhere for all observers. What does this say about space as you approach the black hole?
Timothy J.
You are in a rocket ship going faster and faster. As your speed increases and your velocity gets closer to the speed of light, which of the following do you observe in your frame of reference? (a) Your mass increases. (b) Your length shortens in the direction of motion. (c) Your wristwatch slows down. (d) All of the above. (e) None of the above.
Madhur L.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD