Generally the limit of visible spectrum is__________?
Correct answer: B. 3800 to 7600 A°
- A. 1000 to 300 A°
- B. 3800 to 7600 A°
- C. 8000 to 10,000 A°
- D. 12,000 to 15,000 A°
Explanation
Visible light has wavelengths of approximately 3800 to 7600 Å, equivalent to 380 to 760 nm. Wavelengths shorter than this are mainly ultraviolet and longer wavelengths are infrared. Students may choose a because it includes short wavelengths, but most of that range is outside the visible region.
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About Spectrum of Hydrogen
The hydrogen spectrum consists of discrete emission lines produced when electrons fall between quantised energy levels and release photons. Questions use the Rydberg equation, photon energy and wavelength, and identify the Lyman, Balmer, Paschen, Brackett and Pfund series, which differ from continuous spectra.
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