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What If a Gamma-Ray Burst Hit a Black Hole? - YouTube
Channel: What If
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what would happen if you took the most
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energetic light source in the universe
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and smashed it into a massive
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gravitational monster
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well you might reverse the flow of time
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how would this event unfold
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how could it affect time as we know it
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and
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what would happen if you got too close
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this is what if and here's what would
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happen if a gamma ray burst hit a black
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hole
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meet your first fighter a black hole
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not so different than your average
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object with mass
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except that it's extremely
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dense
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most black holes are the remnants of
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massive stars
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and they have lots of gravity
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the mass of this black hole is
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compressed to a point called a
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singularity
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at this infinitely small point in the
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center conceptions of space and time
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break down today's challenger is a gamma
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ray burst
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not so different from your average burst
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of visible light
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oh yeah except way more energetic
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gamma ray bursts are the strongest and
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brightest explosions in the universe
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in one second gamma ray bursts emit as
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much energy as the sun will emit during
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its entire 10 billion year life span
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so if these two powerful phenomena
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collide
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would space and time cease to exist
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no matter what happens next in this
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video it's my job to report it clearly
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what if and get 20 off grammarly premium
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yeah 20 off at g-r-a-m-m-a-r-l-y
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dot com slash what if
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with these two monster forces coming at
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each other
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i have only one message for you right
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now
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duck
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there are a couple of things you should
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know before we get underway with our
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space-time obliterating cage match
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the first is that our two contenders
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already interact pretty often
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a black hole releases a burst of
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gamma-ray light when it's created
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this burst spreads out evenly in all
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directions across the universe
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so some of these gamma-rays will
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certainly encounter another black hole
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or two
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and these gamma-ray bursts happen about
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once a day
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they could flash for less than two
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seconds or
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they could last for up to 30 seconds
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the difference is whether the burst
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results from two neutron stars colliding
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to form a black hole or
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whether it's the result of a star
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collapsing directly into a black hole
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without a supernova explosion
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so
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if you managed to observe these
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phenomena
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would you witness a magnificent
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explosion about a million trillion times
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brighter than the sun
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well not quite
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while some photons have just the right
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amount of frequency to be visible to
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your eyes
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the frequency of gamma rays is way too
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high your eyes aren't advanced enough to
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see their beautiful bursts
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but if you could see them this insane
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amount of light would probably leave you
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blind
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now surely this explosion must be loud
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right
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well once again i come bearing bad news
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it would technically
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sound like nothing
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yeah
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sound doesn't travel in the vacuum of
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space
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it needs a medium with particles to
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carry sound waves
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but thanks to the scientists at nasa
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a gamma ray burst would sound a little
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something like this
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okay not exactly like this
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these beautiful cello and piano notes
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translate the gamma-ray frequencies into
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musical notes
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pretty mellow for such a massive
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explosion right
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but if you were close to this explosion
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things would be
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anything but mellow for you
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gamma rays are hazardous
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they can penetrate lead concrete and
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certainly whatever space suit you'd be
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wearing
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as they passed through your body they'd
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deliver an extremely high dosage of
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radiation
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you'd suffer radiation sickness you'd
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become nauseous
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lose your hair and even bleed
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the energy could cause damage to your
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tissue and your dna
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leading to cancer or
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worse
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death the gamma rays could cook you from
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the inside out
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so
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you'd want to back up a little bit
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or better yet reverse time
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in 2018 researchers observing gamma-ray
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burst pulses found that some events
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repeated themselves in reverse
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that's right it was as if they were
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moving backward
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so
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what does this mean for you
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did you just stumble on a way to travel
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back in time
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again i have bad news
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this is merely an optical phenomenon
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light has the fastest speed in the
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universe but this is only true for the
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speed of light traveling through empty
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space
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in other mediums like water
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it would be possible for electrons to
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travel faster
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that means if gamma rays could travel
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faster than the speed of light
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they would give the illusion of
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reversing time
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so yeah it's possible i oversold you a
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bit on the idea that if a gamma ray
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burst collided with a black hole it
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would result in the brightest loudest
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time destroying explosion of all time
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but in some ways it's all true
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now until our sun collapses into a black
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hole and sends a burst of gamma rays in
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your direction
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you don't have to worry
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but
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if a black hole swallowed our sun
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gamma rays wouldn't be your only problem
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but that's a story
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for another
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what if
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you
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