FTIR Machine: Interference of Blackbody Radiation Source

  • Thread starter Thread starter physical101
  • Start date Start date
  • Tags Tags
    Ftir Machine
AI Thread Summary
In FTIR spectroscopy, the blackbody radiation source emits a broad spectrum of infrared frequencies. These frequencies are split at the beam splitter, where half is reflected and half is transmitted. The reflected beam returns from a fixed mirror, while the transmitted beam is altered by a moving mirror before recombining at the beam splitter. This interference of the two beams creates a resultant wave that passes through the sample and reaches the detector. Ultimately, all frequencies from the blackbody source contribute to the final detected signal.
physical101
Messages
41
Reaction score
0

Homework Statement


Hi there sorry to keep bombarding you all with these stupid questions but I just can't picture it in my head. In a FTIR machine when the blackbody radiation source is split at the beam splitter and half the frequencies are retarded before making a resultant wave and passing throught the sample and reaching the detector, would I be correct in thinking that all of the frequencies emitted from the blackbody radiation source interfere to produce one resultant wave which is then detected at the detector?


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org


Well FTIR spectrometers have a infrared source(IR), has a broad spectrum, first goes to the beam splitter then 50% is reflected and transmitted. The reflected beam is reflected back by the fix mirror and the transmitted beam is reflected by the moving mirror to the beam splitter. Two beams interfere at the beam splitter then go through the sample.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

How does a FTIR machine operate?
Replies
2
Views
6K
I Blackbody radiation and the cosmic microwave background
Replies
29
Views
4K
Interferometer to measure refractive index of a gas
Replies
1
Views
2K
I Energy emitted by EM sources under constructive interference
Replies
7
Views
1K
I Mechanism of Energy Conservation in Zero-Amplitude Sum of EM Waveforms
Replies
12
Views
693
Radioactive Source Emitting Only Alpha and Gamma Radiation
Replies
3
Views
2K
I How Does a Photon Interfere in an Experiment with Less Than One Photon?
Replies
14
Views
2K
I Problem with the polarization of entangled photons
Replies
7
Views
2K
The Doppler Effect - Finding Velocity of Source
Replies
18
Views
13K
Spectral Intensity as a Function of Wavelength in Blackbody Radiation
Replies
16
Views
6K

Hot Threads

Recent Insights

Back
Top