Speed of Light and Optics Quiz

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Questions and Answers

What is the speed of light in a vacuum?

  • $4.00 \times 10^8$ m/s
  • $2.00 \times 10^8$ m/s
  • $1.00 \times 10^8$ m/s
  • $3.00 \times 10^8$ m/s (correct)

Which color of light has the shortest wavelength in the visible spectrum?

  • Red
  • Violet (correct)
  • Blue
  • Green

What happens to the speed of light when it passes from air into glass?

  • It decreases (correct)
  • It remains the same
  • It increases
  • It depends on the color of light

Which scientist is credited for the first successful measurement of the speed of light?

<p>Ole Rømer (C)</p> Signup and view all the answers

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Study Notes

Light Properties

  • The speed of light in a vacuum is a constant, approximately 299,792,458 meters per second (m/s).

Visible Spectrum

  • Violet light has the shortest wavelength in the visible spectrum.

Refraction

  • When light passes from air into glass, its speed decreases due to the change in medium.

History of Light Measurement

  • Ole Rømer, a Danish astronomer, is credited with the first successful measurement of the speed of light in 1676.

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