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In UV-Vis spectroscopy, what is the effect of increasing the path length of the

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Question: In UV-Vis spectroscopy, what is the effect of increasing the path length of the sample cell?

Options:

  1. Decreases absorbance
  2. Increases absorbance
  3. No effect on absorbance
  4. Increases transmittance

Correct Answer: Increases absorbance

Solution: 

Increasing the path length of the sample cell increases the absorbance according to the Beer-Lambert Law, as absorbance is directly proportional to path length.

In UV-Vis spectroscopy, what is the effect of increasing the path length of the

Practice Questions

Q1
In UV-Vis spectroscopy, what is the effect of increasing the path length of the sample cell?
  1. Decreases absorbance
  2. Increases absorbance
  3. No effect on absorbance
  4. Increases transmittance

Questions & Step-by-Step Solutions

In UV-Vis spectroscopy, what is the effect of increasing the path length of the sample cell?
  • Step 1: Understand what UV-Vis spectroscopy is. It is a technique used to measure how much light is absorbed by a sample.
  • Step 2: Learn about the sample cell. This is the container that holds the sample being tested.
  • Step 3: Know what path length means. Path length is the distance that light travels through the sample in the cell.
  • Step 4: Familiarize yourself with the Beer-Lambert Law. This law states that absorbance (how much light is absorbed) is directly proportional to the path length of the sample.
  • Step 5: Realize that if you increase the path length, the light has to travel through more of the sample.
  • Step 6: Understand that as the path length increases, more light is absorbed by the sample, leading to higher absorbance readings.
  • Beer-Lambert Law – The Beer-Lambert Law states that absorbance is directly proportional to the concentration of the absorbing species and the path length of the sample.
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