Questions tagged [instrument]
A measurement instrument is a device used to sample physical observations. Examples include pressure sensors, thermocouples, etc.
111 questions
4 votes
2 answers
1k views
Would a microscope behave as a telescope if we brought the objective lens closer to the eye piece?
I believe there are two ways to transform a compound microscope to a telescope. Either you bring the the objective lens closer to the eyepiece(what i think) or you increase the focal length(what i ...
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0 votes
1 answer
86 views
Is reflection or refraction responsible for formation of standing waves within a tube?
I can't understand whether reflection/refraction of sound wave is responsible for the formation of standing waves in tubes. My teacher approached the topic by discussing the angle of incidence of ...
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0 votes
1 answer
94 views
Detailed Exploration of Hartley Gravimeter Design
The Hartley gravimeter is an intriguing instrument used in geophysical measurements to detect variations in gravitational forces, but the reasoning behind its design remains somewhat unclear. I’ve ...
user179370
1 vote
2 answers
142 views
Modifying a conventional solenoid by replacing the insulating core with a hollow metal cylinder
If current-carrying wires are wound around an insulating cylinder, the device behaves as a conventional solenoid. If the solenoid is very long, the expression for the magnetic field inside is given by ...
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0 votes
1 answer
88 views
An instrument for sensitive time interval measurements?
I had the idea to do an experiment at home that would let me calculate the air resistance. $F_{net} = m.a = m.g - f_k$ (kinetic friction), in the case of free fall, so I thought I’d drop an object of ...
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6 votes
3 answers
3k views
What is meant by precision of a measuring instrument?
I came across many definitions of the precision of a measuring instrument such as, "a precise measuring tool is one that can measure values in very small increments" and "The precision ...
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1 vote
0 answers
84 views
Why to use the Callendar equation instead of the temperature coefficient differential equation?
The temperature coefficient differential law gives an equation for the temperature coefficient $\alpha$, which describes the relative change of a physical property $R$ that is associated with a given ...
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0 votes
0 answers
145 views
What is heard when a tuning fork is struck?
When a tuning fork is struck I hear two tones. From a distance I can hear a high octave frequency of the pitch of the tuning fork. Though, if I listen to it closely (closer to my ears), I also hear a ...
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1 vote
1 answer
150 views
Is the lens image, a combination of diffraction patterns?
As I was reading through Luigi Picasso's Lectures in QM, I came across this paragraph where he explains the reason behind the resolution power of the optical instruments. He writes: Let us now ...
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1 vote
0 answers
100 views
Measurement paradox
When building electronics to measure usually it is asked what the bandwidth of the signal is and what is the frequency range usually done to limit noise bandwidth and thus have more SNR. To me it ...
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0 votes
1 answer
80 views
How should I esteem the measurement error using an instrument with high precision and low accuracy?
I was performing an experiment about the Beer–Lambert law using a luxmeter I bought online. In the user manual it's stated it has "$Accuracy: \pm\,3\%\,reading\pm\,8\,digits$". During the ...
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1 vote
0 answers
83 views
Why is the bias instability read from my Allan Deviation plot different than my simulation input? [closed]
I have simulated a gyroscope at rest with angular random walk and bias instability, following the mathworks IMU simulation model found here. In conjunction with that simulation model, I am plotting ...
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3 votes
0 answers
110 views
What is the meaning of "Dual Accuracy" on this datasheet?
I'm trying to determine the uncertainty in some of my measurements, and one of the variables I measure is temperature, using a Tenma 72-7715 thermometer. I looked up the datasheet to find the ...
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1 vote
2 answers
131 views
The sun's neutrinos and the brain [closed]
Is it possible for the sun's neutrinos to be detectable biologicaly . Or what is the simplest way for a experimenter to detect neutrinos externally?
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1 vote
1 answer
1k views
Difference between BATT and Voltage on multimeter
My digital multimeter (the one in the picture) has a function called "BATT", which, according to the manual, is used to read the voltage of batteries. I noticed that it gives different ...
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