Hi there,
Just reviewing my Ideas to Implementation summary and have a few questions
Sure thing!
Why do we use a high voltage source in cathode ray tubes? And why can it only be sourced from an induction coil? Why can't a transformer be used?
A high voltage is required for the air in the tube (even the reduced amount we get by using an evacuated tube) to break down and allow a flow of electrons through it. This is called breakdown. Essentially, it is the point where even the resistance of the air in the tube isn't enough to stop a current flow between the cathode and anode.
Pretty sure you can get this voltage from anywhere you want to, but it needs to be
DC. You can't use a transformer directly because that would be
AC, but you could rectify the voltage coming out of a transformer if you wanted to
Do we need to know why/how Hertz was inaccurate in his experiments which supposedly proved the wave properties of light?
I wouldn't put too much effort into it. Just say lack of accurate measuring equipment, that's what I'd do!
If so, how does a cathode tube with some gas remaining (not completely evacuated) cause no observable deflection when an electric field is applied?
Not quite sure what you are asking here sorry, but no cathode ray tube is completely evacuated. There's always
some air left inside. The amount of air will change the voltage you need across the plate, as well as the striation patterns, but within reason small differences in the amount of air in a tube won't affect much else
Considering that F = qvBsin(theta) and F = qE, does E = vbson(theta)?
Not quite, those are
two different forces. \(F=Bqv\sin{\theta}\) is the force on a moving charge due to a magnetic field, while \(F=Eq\) is the force on a charge due to an electric field. Together, we call the sum of these forces the
Lorentz Force, but they aren't the same thing
Is theta always 90° when the magnetic field is going in or out of the page and the particle is moving left/right/up/down, or in any direction around the page?
Yep
Thank you so much!!
(Expect some edits with more questions )
You're welcome! Maybe ask the rest in a new post so we don't miss it