Electromagnetic Spectrum and Light

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Questions and Answers

What is the relationship between the wavelength and frequency of electromagnetic waves?

  • The wavelength is proportional to the square of the frequency
  • The wavelength is inversely proportional to the square of the frequency
  • The wavelength is directly proportional to the frequency
  • The wavelength is inversely proportional to the frequency (correct)

What is the range of wavelengths of visible light in centimeters?

  • 0.00001 to 0.0001 cm
  • 0.001 to 0.01 cm
  • 0.00004 to 0.00007 cm (correct)
  • 0.0001 to 0.001 cm

What is the name of the phenomenon where light bends when entering a transparent medium?

  • Total Internal Reflection
  • Rectilinear Propagation
  • Refraction (correct)
  • Reflection

What happens to light when it passes at an angle from a medium of higher index to one of lower index?

<p>It is reflected internally at the maximum angle (D)</p> Signup and view all the answers

Why does yellow light appear brighter to the eye than red light?

<p>Because the human eye is more sensitive to yellow light (B)</p> Signup and view all the answers

What is the speed of light in meters per second?

<p>3.00 x 10^8 m/s (B)</p> Signup and view all the answers

What is the orientation of the electric and magnetic fields with respect to the direction of wave propagation in an EM wave?

<p>Perpendicular to each other and to the direction of wave propagation (A)</p> Signup and view all the answers

What is the condition for total internal reflection?

<p>The angle of incidence is greater than the critical angle (D)</p> Signup and view all the answers

What is the speed of EM waves in a vacuum?

<p>3.00x10^8 m/s (C)</p> Signup and view all the answers

What is exhibited by EM waves?

<p>Reflection, refraction, diffraction, and interference (C)</p> Signup and view all the answers

Who predicted the existence of EM waves in 1862?

<p>James Clerk Maxwell (C)</p> Signup and view all the answers

What is the speed of an electromagnetic wave through a vacuum?

<p>3.00 x 10^8 m/s (C)</p> Signup and view all the answers

What determines the actual speed of an electromagnetic wave through a material medium?

<p>The optical density of the medium (A)</p> Signup and view all the answers

What is the term for the ability of an object to slow or delay the transmission of light?

<p>Optical density (A)</p> Signup and view all the answers

Which medium has the highest speed of light?

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

What is the term for a medium in which the speed of light is less?

<p>Optically denser medium (C)</p> Signup and view all the answers

What is the relationship between the speed of light and the optical density of a medium?

<p>The speed of light decreases with increasing optical density (A)</p> Signup and view all the answers

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