June 27, 2016 Monday
Post attack day 5
The experiment that Rutherford had designed required working in a darkened lab hours on end and counting tiny scintillations using a microscope.
Rutherford lacked the endurance for this and hence hr delegated this tedious and laborious work to Hans Geiger and Ernest Marsden.
The results of the first experiment was published in 1908 titled:
"On the scattering of alpha particles by Matter".
This first experiment was conducted in a glass tube nearly 2 metres long.
At one end of the tube was radium R that was the source of alpha particles.
On the opposite end was a phosphorescent screen Z.
In the middle was a 0.9 mm wide slit S.
A microscope M was used to count the scintillations on the screen and measure their spread.
When Geiger pumped out all the air from the tube, the alpha particles flew unobstructed casting a neat and tight image on the screen.
When some air was allowed in the tube, the tight spot became diffuse due to collision of alpha particles with the air molecules.
Geiger then pumped out the air and placed a gold foil over the slit S at AA.
What do you think Geiger observed?
Take a guess.
Once again the tight spot on the screen became more diffuse just like with the air.
Thus both solid matter and air could scatter alpha particles in an identical manner.
This instrument as you can see could observe deflections of only small angle.
So what did Rutherford plan next?
We will have to wait for the 4.6 billion year old planet to rotate on its tilted axis.
Stay tuned to the voice of storytelling chimpanzee or login at http://panarrans.blogspot.in/
Good night mon ami and my fellow cousin ape.
Post attack day 5
The experiment that Rutherford had designed required working in a darkened lab hours on end and counting tiny scintillations using a microscope.
Rutherford lacked the endurance for this and hence hr delegated this tedious and laborious work to Hans Geiger and Ernest Marsden.
The results of the first experiment was published in 1908 titled:
"On the scattering of alpha particles by Matter".
This first experiment was conducted in a glass tube nearly 2 metres long.
At one end of the tube was radium R that was the source of alpha particles.
On the opposite end was a phosphorescent screen Z.
In the middle was a 0.9 mm wide slit S.
A microscope M was used to count the scintillations on the screen and measure their spread.
When Geiger pumped out all the air from the tube, the alpha particles flew unobstructed casting a neat and tight image on the screen.
When some air was allowed in the tube, the tight spot became diffuse due to collision of alpha particles with the air molecules.
Geiger then pumped out the air and placed a gold foil over the slit S at AA.
What do you think Geiger observed?
Take a guess.
Once again the tight spot on the screen became more diffuse just like with the air.
Thus both solid matter and air could scatter alpha particles in an identical manner.
This instrument as you can see could observe deflections of only small angle.
So what did Rutherford plan next?
We will have to wait for the 4.6 billion year old planet to rotate on its tilted axis.
Stay tuned to the voice of storytelling chimpanzee or login at http://panarrans.blogspot.in/
Good night mon ami and my fellow cousin ape.
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