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The critical mass is less than anyone thought
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Red Joan

The critical massis less than anyone thought. That can't be right. 235 with a radius

The critical mass
is less than anyone thought. That can't be right. 235 with a radius

Full Transcript

00:00:01.000 --> 00:00:02.088
The critical mass is less than anyone thought.
00:00:02.091 --> 00:00:06.003
That can't be right. 235 with a radius...
Duration
6 seconds
Views
48
Timestamp in Movie
00:27:14
Uploaded
Jun 24, 2025
Genres
biography, drama, history
Production
Trademark Films,Cambridge Picture Company

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Movie Summary

The story of Joan Stanley, who was exposed as the K.G.B.'s longest-serving British spy.
I'm sure we'll get better a better answer, as soon as we have the data on 235. - Red Joan 00:04
I'm sure we'll get better a better answer, as soon...
- I'm so sorry. I studied gasses. - Say that again. - Red Joan 00:04
- I'm so sorry. I studied gasses. - Say that again.
Well, I'm sure you've already thought of this, but... - Red Joan 00:04
Well, I'm sure you've already thought of this, but...
A centrifugal force could separate a gaseous mixture of the two isotopes. - Red Joan 00:06
A centrifugal force could separate a gaseous mixture of the ...
That's good. It's an interesting theory. - Red Joan 00:05
That's good. It's an interesting theory.
This is exactly why I wanted a first class science graduate as an assistant - Red Joan 00:07
This is exactly why I wanted a first class science graduate ...
You're not... not a pretty face. - Red Joan 00:04
You're not... not a pretty face.
Imagine if it were possible, to separate the two isotopes. - Red Joan 00:06
Imagine if it were possible, to separate the two isotopes.
And you had a critical mass; pure uranium 235 in isolation. - Red Joan 00:07
And you had a critical mass; pure uranium 235 in isolation.
Then more Uranium nuclei would split. - Red Joan 00:05
Then more Uranium nuclei would split.
The result will be a self-sustaining chain reaction. - Red Joan 00:05
The result will be a self-sustaining chain reaction.
If we have a chance in hell of winning this damned war, - Red Joan 00:05
If we have a chance in hell of winning this damned war,
Now, I want you to read these summaries. - Red Joan 00:06
Now, I want you to read these summaries.
See if you can create a basic diagram for the laymen to understand. - Red Joan 00:05
See if you can create a basic diagram for the laymen to unde...
- James Chadwick? - That's right! - Red Joan 00:06
- James Chadwick? - That's right!
Listen, if you want to make pictures of the next phase, that would be good. - Red Joan 00:05
Listen, if you want to make pictures of the next phase, that...
I came to see my old tutor before he pops his clogs. - Red Joan 00:05
I came to see my old tutor before he pops his clogs.
- Have you heard from anyone? - Leo writes. - Red Joan 00:04
- Have you heard from anyone? - Leo writes.
Sonya has my new address, but no word. - Red Joan 00:04
Sonya has my new address, but no word.
- Which is exactly? - Research. - Red Joan 00:04
- Which is exactly? - Research.