hi,
I am interested to know how the lock in amplifier works?
It is very commonly seen with oscilloscope, but I fail to grasp the idea behind it?
I would appreciate any lecture notes or sites which give clear and precise understanding of it.
Thanks
probabilty to find...
Hello,
I have a question...
if there is 1 man with 6 ft height in 500 people. What will be the probability to find men with 6 ft in europe(say) or if I say like this...there is 1 man with 6 ft height in 500 people, what is the percentage of 6 ft high men in Europe...
No, I mean it is operated at two temperatures for calibration of film thickness, one is water cooled temp. and the other is 65 deg?
What is the effect of frequency vs time for quartz? is it stable for these two temp or what?
and as far as i understood, you mean to say...that with change in...
can you kindly explain me a little bit more about it in detail?
Also, why is that, it operates at water cooled temp. and at 65 deg?
how does this change anything related to thickness measurement?
Quartz crystal microbalance is the vacuum chamber, where some material from some source is evaporated. The QCM vibrates with some frequency(I guess) and then the thickness of the film deposited on the Quartz crystal is measured with the instrument. What I don't understand is how the change in...
Thanks for the reply, but I want to know about the Quartz crystal microbalance, which is used in Ultra high vacuum for monitoring the thickness of the film. I don't understand how the QCM measures the thickness of the film. I want to know its function in a simple way.
but thanks for the reply.
I want to know the basic principle of working for quartz crystal microbalance, how it is used to measure the thickness of the film?And why it can work at room temp (with water cooling) and at higher temp say 65deg ??