Wavelength of reflected light vs transmitted light In the basic setup of the experiment below, the transmitted light is used to infer the absorbed wavelengths. The explanation of the experiment states that a high transmittance reading for a specific wavelength means that wavelenght is not absorbed.Does this mean that the wavelength of the transmitted light and the reflected right are equal?

 A: Why are you asking about reflected light levels?  Are you worried that the flask and/or the solution have spectrally-varying reflectances?   If so, then the standard way to deal with that is to run a reference calibration with the flask and whatever solution you intend to  use, but none of the test material itself.  Treat the transmitted power curve as a normalizer for the data you collect thru the test specimen.
A: Some assumptions will have to be made here as the question and image is not very detailed.
I am guessing that you're talking about the reflected light from the slit? I.e that that does not get transmitted? This light should be either absorbed or diffusely reflected. As you can see the prism spatially separates the different wavelengths due to the refraction. By moving the slit the transmitted wavelength can then be chosen.
A: There exists some time where the signal is transient and subject to interference from other such waves along its length about its frequency.
If you articulate what intrinsic property you are after I will try to dig it up / improve my answer.
