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Questions and Answers
What is the range of wavelengths for visible light?
What is the range of wavelengths for visible light?
- 600–800 nanometres (nm)
- 200–500 nanometres (nm)
- 400–700 nanometres (nm) (correct)
- 300–600 nanometres (nm)
What are the primary properties of light?
What are the primary properties of light?
- Amplitude, velocity, and polarization
- Reflection, refraction, and diffraction
- Color, speed, and frequency
- Intensity, propagation direction, and frequency or wavelength spectrum (correct)
What is the speed of light in vacuum?
What is the speed of light in vacuum?
- $3.00 \times 10^8$ m/s (correct)
- $3.50 \times 10^8$ m/s
- $2.99 \times 10^8$ m/s
- $2.50 \times 10^8$ m/s
What represents the quanta of the electromagnetic field?
What represents the quanta of the electromagnetic field?
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What is the main source of natural light on Earth?
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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