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TG ICET 2025 9th June 2025 Shift 1
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Question Numbers : (196 to 200)
Comprehension Passage-3
There are three ways a star can die. If it is of the same size as our Sun, it will exhaust its hydrogen fuel, expend to a red giant and then slowly shrink to a white dwarf. Eventually it will cool to a black dwarf, a permanently embalmed corpse that never changes.
If a star is moderately more massive than the Sun, it is likely to explode into a supernova leaving a still more dense residue of neutron star astronomers called pulsar, because it sends out absolutely regular pulses or beeps of radio waves, sometimes beeps of visible light.
Finally, if a star is much more massive than the Sun, it is expected to expire in a manner so bizarre that its ultimate fate is still in an unresolved mystery. On expiry it undergoes a catastrophic implosion, a sort of explosion in reverse, so that even neutrons are unable to withstand its enormous gravitational compression. All particles are crushed out of existence and the laws of physics cease to have any meaning. It has entered a 'singular' state called blackhole.
While our milky way is littered with stellar corpses of the first two kinds-white/black dwarfs and pulsars - no corpse of the third type - a black hole - has been discovered.
Comprehension Passage-3
There are three ways a star can die. If it is of the same size as our Sun, it will exhaust its hydrogen fuel, expend to a red giant and then slowly shrink to a white dwarf. Eventually it will cool to a black dwarf, a permanently embalmed corpse that never changes.
If a star is moderately more massive than the Sun, it is likely to explode into a supernova leaving a still more dense residue of neutron star astronomers called pulsar, because it sends out absolutely regular pulses or beeps of radio waves, sometimes beeps of visible light.
Finally, if a star is much more massive than the Sun, it is expected to expire in a manner so bizarre that its ultimate fate is still in an unresolved mystery. On expiry it undergoes a catastrophic implosion, a sort of explosion in reverse, so that even neutrons are unable to withstand its enormous gravitational compression. All particles are crushed out of existence and the laws of physics cease to have any meaning. It has entered a 'singular' state called blackhole.
While our milky way is littered with stellar corpses of the first two kinds-white/black dwarfs and pulsars - no corpse of the third type - a black hole - has been discovered.
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