Ultraviolet and Visible Spectroscopy Quiz

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Questions and Answers

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

  • 100-300 nm
  • 380-750 nm (correct)
  • 500-1000 nm
  • 200-500 nm

In which unit of the course is Ultraviolet and Visible Spectroscopy covered?

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

Which professor teaches the course 'Instrumentation Techniques for Forensic Science'?

  • Dr. S. KUMAR
  • Dr. R. NANDHAKUMAR (correct)
  • Dr. M. SINGH
  • Dr. P. SHARMA

What type of light is sunlight considered to be?

<p>White light (C)</p> Signup and view all the answers

What is the main topic covered in Unit 2 of the course?

<p>Ultraviolet and Visible Spectroscopy (B)</p> Signup and view all the answers

What is the main focus of Ultraviolet and Visible Spectroscopy in forensic science?

<p>Qualitative detection and quantitative measurements (D)</p> Signup and view all the answers

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

<p>Absorption and reflection properties of the material in the object (A)</p> Signup and view all the answers

What color does a material appear if it completely reflects all light?

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

What color does a material appear if it absorbs a constant fraction of the light across the spectrum?

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

When does the eye see complementary colors in visible spectroscopy?

<p>When a sample absorbs light of a single wavelength (A)</p> Signup and view all the answers

What is the wavelength range for UV radiation in UV/Visible spectroscopy?

<p>220 – 380 nm (A)</p> Signup and view all the answers

What type of instruments are used for measuring substances that absorb UV and/or Visible radiation at particular wavelengths?

<p>Spectrophotometers or spectrometers (C)</p> Signup and view all the answers

What does UV-Visible spectroscopy measure the interaction between?

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

What happens when matter absorbs ultraviolet radiation in UV-Visible spectroscopy?

<p>The electrons jump from a ground state to an excited state (D)</p> Signup and view all the answers

What is the principle based on which UV-Visible spectroscopy works?

<p>Absorption of light by chemical compounds (D)</p> Signup and view all the answers

What instruments are used for making measurements in UV-Visible spectroscopy?

<p>spectrophotometers or spectrometers (D)</p> Signup and view all the answers

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