Sir
I am Shaun job of class 9. I have a doubt regarding chemistry on the topic the structure of the atom
This is the question,
Is the gas used inside the discharge tube a gas of low density?
Thank you sir
Shaun
I am Shaun job of class 9. I have a doubt regarding chemistry on the topic the structure of the atom
This is the question,
Is the gas used inside the discharge tube a gas of low density?
Thank you sir
Shaun
Low density and low pressure
if the gas was at normal pressure there would be too much gas in the way and it would stop being a beam.
the electrons in the beam can be deflected if they hit molecules of gas. if too many of them are deflected either none will rech the target or the spot on the target will be very diffuse.
lowering the pressure means that there are less molecules to collide with so everything works nicely.
an analogy would be if you had some flour in your hand and you blew on it. due to the atmosphere it forms a billowy cloud that doesn't really go very far. but if you did in a vacuum (well, used a can of air rather than blew on it yourself due to the low pressure) the flour would probably go clear across the room.
If there were many, many air molecules (normal or high pressure) inside the tube, then the electrons would simple smash into them and the electrons would not be able to travel easily to the other end of the tube.
Imagine that you are an electron and you are driving in your car on a road... if there was a traffic jam (the cars jamed together would be like air molecules at high pressure) you wouldn't be able to find a way through to keep travelling.You would constantly be bumping into other cars. (OOPS!) If the other cars were magically sucked out into space (Just like the air molecules are sucked out to create low pressure) then you'd have a nice, fast, pleasant drive..
Hope that helps
if the gas was at normal pressure there would be too much gas in the way and it would stop being a beam.
the electrons in the beam can be deflected if they hit molecules of gas. if too many of them are deflected either none will rech the target or the spot on the target will be very diffuse.
lowering the pressure means that there are less molecules to collide with so everything works nicely.
an analogy would be if you had some flour in your hand and you blew on it. due to the atmosphere it forms a billowy cloud that doesn't really go very far. but if you did in a vacuum (well, used a can of air rather than blew on it yourself due to the low pressure) the flour would probably go clear across the room.
If there were many, many air molecules (normal or high pressure) inside the tube, then the electrons would simple smash into them and the electrons would not be able to travel easily to the other end of the tube.
Imagine that you are an electron and you are driving in your car on a road... if there was a traffic jam (the cars jamed together would be like air molecules at high pressure) you wouldn't be able to find a way through to keep travelling.You would constantly be bumping into other cars. (OOPS!) If the other cars were magically sucked out into space (Just like the air molecules are sucked out to create low pressure) then you'd have a nice, fast, pleasant drive..
Hope that helps
