The range of wavelength of visible light is:
Correct answer: D. 4000Å - 7000Å
- A. 700Å - 1000Å
- B. 1nm - 100nm
- C. 0.1nm - 1nm
- D. 4000Å - 7000Å
Explanation
The range of wavelengths of visible light is approximately 4000 angstroms (Å) to 7000 angstroms (Å).
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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