Questions and Answers
What is the range of wavelengths for visible light?
400–700 nanometres (nm)
What are the primary properties of light?
Intensity, propagation direction, and frequency or wavelength spectrum
What is the speed of light in vacuum?
$3.00 \times 10^8$ m/s
What represents the quanta of the electromagnetic field?
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What is the main source of natural light on Earth?
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Study Notes
Properties of Light
- The range of wavelengths for visible light spans from approximately 400 to 700 nanometers (nm).
- Light exhibits three primary properties: it is a form of electromagnetic radiation, it travels in a straight line, and it can exhibit both wave-like and particle-like behavior.
Speed of Light
- The speed of light in vacuum is approximately 299,792,458 meters per second (m/s) or 186,282 miles per second (mi/s).
Electromagnetic Field
- Photons represent the quanta of the electromagnetic field.
Natural Light Source
- The main source of natural light on Earth is the Sun.
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