Light Characteristics and Interactions

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Questions and Answers

What is the type of scattering that occurs when shorter wavelengths of light are scattered more than longer wavelengths?

  • Inelastic Scattering
  • Mie Scattering
  • Raleigh Scattering (correct)
  • Elastic Scattering

What is the wavelength limit beyond which light penetration into tissue is severely limited?

  • 1400nm (correct)
  • 1000nm
  • 1600nm
  • 1200nm

Which of the following ocular structures has the highest absorption of UV and IR light?

  • Retina
  • Cornea (correct)
  • Sclera
  • Lens

What is the type of light that is most absorbed by hemoglobin?

<p>Visible Light (D)</p> Signup and view all the answers

Which of the following types of scattering occurs due to the irregularities in the surface of the tissue?

<p>Mie Scattering (B)</p> Signup and view all the answers

What is the type of light that is most affected by the absorptive properties of nucleic acids and amino acids?

<p>UV-C (A)</p> Signup and view all the answers

What is the primary mechanism of photothermal ablation?

<p>Temperature rise (D)</p> Signup and view all the answers

What is the name of the process where protein chains are denatured due to an increase in temperature?

<p>Photocoagulation (B)</p> Signup and view all the answers

What is the term for the release of toxic products, such as free radicals, caused by photochemical interactions?

<p>Photosensitizers (B)</p> Signup and view all the answers

What is the term for the process of using light to target specific tissue, minimizing damage to surrounding tissue?

<p>Selective photothermolysis (C)</p> Signup and view all the answers

What is the term for the formation of vacuoles in tissue due to temperature rise?

<p>Popcorn effect (B)</p> Signup and view all the answers

What is the term for the type of damage mechanism that involves the absorption of light, leading to mechanical damage?

<p>Photomechanical damage (B)</p> Signup and view all the answers

What is a characteristic of photochemical reactions?

<p>No threshold of energy required (A)</p> Signup and view all the answers

What type of therapy involves photoradiation and photodissociation?

<p>PDT (Photodynamic Therapy) (A)</p> Signup and view all the answers

What is the process by which plasmas can cause tissue disruption?

<p>Ionization followed by plasma growth and tissue disruption (B)</p> Signup and view all the answers

What is a factor that influences the severity of tissue damage in the eye?

<p>All of the above (D)</p> Signup and view all the answers

What is a type of photomechanical damage?

<p>Photodisruption (D)</p> Signup and view all the answers

What is a characteristic of plasma formation?

<p>Multiple ionization and high temperature (B)</p> Signup and view all the answers

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