Question

answer! 3. What is the relationship between transmittance and absorbance? How a shift to higher absorbance is described, does it changes the intensity of absorption? 4. Give examples of two absorption spectroscopies examples. How IR is different than the UV/UV-VIS? Anu Arun absorptions change based on the functional

Answer 1

Relation between absorbance and transmittance is also known as Beer's law.

Complaints Text Way arts Ane Many compound's absorb ulfaviolet and visible light, suppose a monochro- matic sadiation power to is directed at a sample sountion them absorption take place and the beam of radiation leaving the sample has radiant power P. --- --> PoP I= Intensity Than transmittance is defined as T = Pllo = 1 / 2 or % Transmittance %T = and Absorbance is defined as Asses Poll = log10 loot / T (%) A = 109, 100/5(4) (use property of log) A = 2-10g % 5 so, if the eight passes through a solution without any absorption, then absorbance is zero, and % pausmittance is 100% and vice-versa, • Yes, a shift to higher absorbance changes the intensity of abscription, because from the above relations A=2-log, T = 2-dog, 17. I/I) which indicates that for a shift in higher absorbance leads to decrease in intensity. 4. Examples of absorption Spectroscopies. uthaviolet/visible right absorption Aux atomic absorption spectroscopy ② Fourier-pansform inpared (FITRI spechoscopy. (not measure absorbance directly). IR and visine is different in the wavelength and in the goals. The wavelengte of infrared eight is longer than urfvisible." Infrared absorption by molecules cessesponds to differences in vibration energy and IR spectroscopy can therefore be used to identify molecular vibrations and uniquely recognize compounds. while uv/visible absorption by molecules coresponds to differences in the (Gvalent of atoms, ferences in the (Gvalent) bonding