Ultraviolet and Visible Spectroscopy in Forensic Science
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Questions and Answers

What is the wavelength range of sunlight, which is considered as white light?

  • 100-300 nm
  • 600-900 nm
  • 380-750 nm (correct)
  • 200-500 nm

    • Which unit covers the study of Ultraviolet and Visible Spectroscopy in the course?

  • Unit 3
  • Unit 1
  • Unit 4
  • Unit 2 (correct)

    • What is the professor's consulting hours?

  • 6:00 - 8:00 P.M
  • 4:00 - 6:00 A.M
  • 2:00 - 4:00 P.M
  • 4:00 - 6:00 P.M (correct)

    • Which type of light is considered a composition of a range of colors?

    <p>Visible light</p> Signup and view all the answers

    What is the teaching scheme for Unit 2, Ultraviolet and Visible Spectroscopy?

    <p>3:0:0:3</p> Signup and view all the answers

    What is the contact information for Dr. R. NANDHAKUMAR?

    <p>+9180984 70837</p> Signup and view all the answers

    What determines the color detected by the eye when white light falls on an object?

    <p>Both absorption and reflection properties of the material</p> Signup and view all the answers

    If a material completely absorbs all light, how does it appear?

    <p>Black</p> Signup and view all the answers

    What do complementary colors indicate in the context of visible spectroscopy?

    <p>Absorption of light in a single wavelength</p> Signup and view all the answers

    What is the principle of UV-Visible Spectroscopy based on?

    <p>Absorption of both ultraviolet and visible light by chemical compounds</p> Signup and view all the answers

    What happens to the electrons in a matter when it absorbs ultraviolet radiation?

    <p>They jump to an excited state</p> Signup and view all the answers

    What kind of measurements can be made with modern spectrophotometers or spectrometers?

    <p>Both qualitative and quantitative measurements</p> Signup and view all the answers

    What is the interaction between light and matter that forms the basis of spectroscopy?

    <p>Absorption and de-excitation</p> Signup and view all the answers

    Which wavelength range does UV radiation fall into?

    <p>$220 - 380$ nm</p> Signup and view all the answers

    What happens to substances that can absorb energy in both UV and visible regions of the electromagnetic spectrum?

    <p>They become colored compounds</p> Signup and view all the answers

    What is used to measure vibrational levels and rotational levels in UV-Visible Spectroscopy?

    <p>Spectrophotometers</p> Signup and view all the answers

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