Like the title says, if you have a bunch of data you can create a best fit line
For example back in school, for a linear line, y = mx + c, you just need 2 points to get a line. But what if you have more than 2 points, say 10, what is the best fit line equation or how do you do it...
What does a higher index of refraction really mean? I know about speed wavelength etc but lets say you have 2 different material to choose and ignoring other variables, and focal length, diameter are all the same between both material, would you choose a lower index refraction or higher.
Thanks
why does the spot size increase with lower f#.
Lets says you have 2 lens of the same material, and diameter, just different focal length. F/2 has higher spot size than F/3 but F/2 is faster. Is spot size a characteristic of a lens? So if your detector is fixed in size you need to get a lens...
Title is a bit off but i don't know what it is called.
Basically,
If you have something like
3.35*10^10 = (400)^(4-x) - (300)^(4-x) and you want to solve for x.
Putting inside TI89, i get the answer x = -0.106072
But what if you do not have any calculator. I'm just wondering because i have a...
I tried TI89 and it did not work
Trying to solve for y in the following equation. I don't have a lot of software resource available to me so no matlab/mathematica/mathcad etc
I'm going try in excel if it can do it.
-383^(4-y) + 408^(4-y) + 297^(4-y) - 301^(4-y) = 3.358*10^10
Thanks
edit...
Hi,
I'm trying to gain a better understanding on poles and zeros. Seems everywhere i read it says the poles and zeros can tell you the system response, characteristic and you can do lots with it from filter design to controls. Its a broad area but was hoping someone can provide further...
What are these? Is it like some 'physical ring' where you out a wire through it or just a connection to make both input to the op-amp common? How does this really help? Seems like you're making a source common to both like gnd so if the gnd is noisy it becomes common for both and rejects it...
My square wave is lagging/leading the sine wave (depending how you interpret it). i want to make the transition of my square wave be at 0 deg for the sine wave. right now the square wave transitions at 130 deg of the sine wave
how can i shift this so that it transitions only at 0 deg or 360...
Is it possible to perform some form of data correction by finding the variance/std dev and covariance?
I have a bunch data all related to a specific observation. For test purposes, i have 1000 samples of each data for certain condition.
I can find the covariance between each data under this...
I have a sine wave. i want to make it 90 degrees out of phase. if i remember correctly i could use a capacitor to create a phase lag of 90 degrees (like on of those motors where they put a capacitor to create the offset so it starts to turn)
Do you put the capacitor in series? What value...
Are there any DPDT switch that can take negative input?
i want to put a sinusoidal as input and use the output to go through a difference amplifier to create a rectifier.
does it work the same if i put a DC offset so i only get positive sinusoidal input to DPDT, and then use the output to...
Like the topic says, is there some software or method you can use (maybe excel?) to create equations?
For example if i knew my graph is going to be a straight line, and i had a few points, i can find the slope, intersection and get my equation.
Then if i knew my graph is a 2nd order and i...
Need some help or suggestion here.
I'm trying to collect some data resulting from very small changes. What i want is for example a change from 40pF to 40.5pF to result in a bigger voltage change say 0.5V to 0.8V, enough for me to see some difference. In other words, a very big SNR.
The way...
I know the formulas, to some extend what impedance is. But i guess i would like to know what it really means in real world and how to use it/match it or manipulate it.
Please help correct my understanding or increase it. :)
High impedance is like high resistance and vice versa. You want...
I am just wondering what is a good material or a material i should look for when choosing to make for the lens holder.
From my detector to the lens (focal length), does it need like a non-absorbing or non reflective material? When a manufacturer sells the complete camera set (regular camera)...
Hi,
I'm trying to measure some low capacitance using parallel plates i built. We're probably looking into the pF, say maybe 20pF (with the pcb board etc). The change in capacitance that i am really interested is very small. For the moment, i have use water as my dielectric. The capacitance...
Trying to create a sine wave. Any oscillator or chips that do it? Looking at 100kHz. Seems like most of the oscillators i find put out 0~3.3/5V square wave.
But i am m looking for -2.5~2.5V 100kHz sine wave output.
I would think the chips create the square wave by taking the sine wave and...
Hello everyone,
I'm trying to find more information to get a better understanding on capacitors. I made a small parallel plate capacitors basically to use it as a sensor and for data collection/analysis to see if there is any correlation with my ongoing research.
The capacitor formula C=...