Q6. As you approach a black hole, you see: a) the rest of the universe in fast m
ID: 1838386 • Letter: Q
Question
Q6. As you approach a black hole, you see:
a) the rest of the universe in fast motion. b) the rest of the universe in slow motion. c) the rest of the universe in normal, except is seems much brighter. d) nothing, because light is repelled by a black hole. e) You can't really approach a black hole; they don't really exist.
Q7. A scientist invents a nuclear powered hydraulic printing press to stamp out billions and billions of pictures of Albert Einstein. Unfortunately, the paper jams and the press goes supercritical stamping and compressing 1 kg of ink into a tiny blob that becomes a black hole. What is the radius of the event horizon for the icky inky black hole?
a) 8.55 x 10^-35 m b) 1.48 x 10^-27 m c) 4.29 x 10^-11 m d) 7.25 x 10^-9 m e) 1.16 x 10^-6 m
Q8. Why can't astronauts travel at the speed of light?
a) They would create a photonic boom shock wave that would shake them and any nearby planets to pieces. b) They would loose to much mass. c) They would become infinitely long. d) There time would speed up, so they would run out of fuel early. e) It would require infinite energy. f) They can travel at the speed of light. They just can't travel faster than the speed of light.
Q9. How long would it take a 0.5 mW He-Ne laser to propel a stationary 70 kg astronaut 10 m through the vacuum of space back to the spaceship?
a) about 6 months b) about 1 years c) about 3 years d) about 10 years e) about 6 centuries !
Q10. How much extra distance does the Earth's space warp add to a trip to the moon?
?a) 0.5 ?m b) 8.3 mm c) 3.6 cm d) 5.21 miles e) 203 miles
Explanation / Answer
Hight gravitation field can change the speed of light. We are aware of the fact that light can not cross the black hole, the reason behind this being the ultra high gravitational field of the black hole. Hence as the speed of light decreases near the black hole, we perceive the images slower and hence the outer world looks like moving at slower speed.
Ans - b
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