Podcast
Questions and Answers
What does the Lambert-Beer Law establish a linear relationship between?
What does the Lambert-Beer Law establish a linear relationship between?
- Transmission and pathlength in the sample
- Absorption and tissue density
- Absorbance and concentration of an absorbing species (correct)
- Reflection and light intensity
What does the absorption mean free path represent?
What does the absorption mean free path represent?
- The average distance a photon travels before being absorbed (correct)
- The absorption cross-sectional area of a material
- The intensity of light entering a sample
- The total pathlength of light through a medium
What does the absorption coefficient, µa, represent?
What does the absorption coefficient, µa, represent?
- Absorption cross-sectional area per unit volume of medium (correct)
- The concentration of Na molecules in the sample
- The intensity of light leaving the sample
- The linear relationship between transmission and absorption
In the context of absorption, what is meant by 'absorbing particles being identical'?
In the context of absorption, what is meant by 'absorbing particles being identical'?
How is 'absorption' defined in the context of Medical Physics?
How is 'absorption' defined in the context of Medical Physics?
What does the Absorption Assumptions state about the distribution of Na (molecules/cm3)?
What does the Absorption Assumptions state about the distribution of Na (molecules/cm3)?
What is the primary mechanism that allows lasers to produce physical effects on tissue for treatment purposes?
What is the primary mechanism that allows lasers to produce physical effects on tissue for treatment purposes?
What happens when the photon frequency matches the frequency associated with a molecule's energy transition?
What happens when the photon frequency matches the frequency associated with a molecule's energy transition?
Which of the following types of transitions emit photons corresponding to specific spectral lines?
Which of the following types of transitions emit photons corresponding to specific spectral lines?
What is the Beer-Lambert law used for?
What is the Beer-Lambert law used for?
Which of the following is a type of chromophore (light absorber) found in tissue?
Which of the following is a type of chromophore (light absorber) found in tissue?
What is the absorption coefficient related to?
What is the absorption coefficient related to?
What is the primary absorber in the UV-visible region of the electromagnetic spectrum in biological tissues?
What is the primary absorber in the UV-visible region of the electromagnetic spectrum in biological tissues?
Which of the following is NOT a major absorption peak for water in the infrared region?
Which of the following is NOT a major absorption peak for water in the infrared region?
What is the approximate absorption depth of light in the 6-7 m wavelength region in biological tissues?
What is the approximate absorption depth of light in the 6-7 m wavelength region in biological tissues?
Which of the following is NOT a major absorption peak for proteins in the infrared region?
Which of the following is NOT a major absorption peak for proteins in the infrared region?
What is the approximate absorption depth of light at $\lambda = 800$ nm in biological tissues?
What is the approximate absorption depth of light at $\lambda = 800$ nm in biological tissues?
