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5,360,064 Views • Jul 23, 2022 • Click to toggle off description
Albert Einstein taught us that space and time belong together to a common entity: space-time. This means that time becomes a dimension, similar to space, and has profound consequences for the nature of time. Most importantly it leads to what has been called the block universe, a universe in which all moments of time exist the same way together. The future, the present, and the past are the same, it is just our perception that suggests otherwise.
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0:00 Intro
00:58 Space-time
02:09 Space-time diagrams
03:40 Special Relativity
05:05 The Relativity of Simultaneity
10:36 The Block Universe
12:46 The if's and but's
14:50 Sponsor Mess
Views : 5,360,064
Genre: Science & Technology
Date of upload: Jul 23, 2022 ^^
Rating : 4.895 (3,182/117,856 LTDR)
RYD date created : 2024-05-04T22:46:09.093877Z
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YouTube Comments - 16,061 Comments
Top Comments of this video!! :3
The past haunts me every day, whether it still exists or not.
416 |
Also notice that our memories can have differences in this manner. My memories of 50 years ago ( I am 80 ) are in a distant past...but the things I did, that I wish I hadn't, such as being rude as a teenager to someone, and we never forget, is as if it was yesterday.
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Not exactly sure about what you said but i did enjoy the way you said it.
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This is the first video I see on this channel. This is very refreshing to have explanations without all the usual background music, hyperactive ton of speech, or lots of graphics moving around!
The calm tone of the video is very good for learning!
938 |
I do love the dry humor woven into the ‘story telling’ and then referred to again randomly…a stand up comic schtick that amazingly turns a physics lecture into a conversation between friends. Brilliant.
448 |
.. I am puzzled by time too.. having a nice memory is a divine gift and actually works like a time machine.. I am 54 now but one mental step back I am in a moment of time when I was 4 years old...and know how I felt on that moment... that is really really a gift... that is the only time travel we are capable of doing I think, but...let's listen to Sabine !
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The block universe idea has comforted me for years. All the dead people we know, are still doing things with us "now".
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Yes, it does! I'm sitting here in the English countryside, on a dark winter's night, looking high above me, into a sky full of stars; many of which are now dead – but because of my unfathomably distant vantage point, are still up there shining, still ‘alive’. It then follows that an alien being sat on the other side of the galaxy, looking our way through some kind of ‘advanced super telescope’, could maybe – just maybe, see my late mum and dad, meeting for the very first time on that dizzy late summer's evening they used to tell me all about.
Believe it; somewhere, everything is still alive.
139 |
This starts to make sense when you think about how we percieve stars. If we observe one star that goes supernova 5 million light years away, and then another star that goes super nova 6 million light years away, each of those events happened a million years apart, and we just happen to be at the oberservable point to witness each at the same time.
809 |
Even though I watched a lot of science videos it is the first time I heard about the block universe. Well explained. And now I am mindblown.
4 |
This video made me realize how often we are watching the past. All YouTube videos we watch in the present were made in some recent or distant past and can be played actively as if they are now in the present. All media and entertainment that’s recorded is that way. I think that’s why stories play such an important role in human development - story is time travel.
239 |
What blew my mind is that when Sabine gave examples of 'now', she knew I was watching the video. Amazing, great video.
128 |
Long ago a thought occurred to me about those films my teacher showed our class in grade school that being that the roll of film was all of time past and if you could pick a point or place along that roll is being a point in the past which you could hypothetically look at or even experience. Now it's interesting to see a smart person talking something in those same terms or similar thought exercise. Thank you for your 'films'.
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Germans always speak such perfect English with beautiful accents .
7 |
This woman can literally talk about anything and my concentration will never break
61 |
As a working class layman, thank you for making this topic more accessible to me.
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just when I thought I had it Sabine hits me with a "Anything exists now, elsewhere. all obervers viewpoints are equally valid = Everything exists now".
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Time is experienced two ways: Chronologically or simultaneously. If you wish you can look at a clock and not think about anything but the seconds that pass in order, or you can think of a number of things at the same time. To say that the past exists is to say that it exists perfectly, ready to be experienced and/or observed perfectly with nothing missing at all; if even the smallest thing is missing or altered, it's not the past- it's something else. If the past still exists, it would be nice to know how to access it just for entertainment and reflection if nothing else. Great topic!
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The strange things about getting old is that the intimate identification of here and now are slowly lost.One feels transposed into infinity more or less are alone.No longer in hope or fear, only observing.
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@Master_Therion
1 year ago
I've been patiently waiting for Sabine to make a video on this topic. It's about time.
8.8K |