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Lecture 5.3- Atomic Spectra (Honors)
- 8. The Electromagnetic Spectrum You must know the relative energies of the types of emr including the colors of visible light
- 9. Sample answers: A. ultraviolet light: Answer C. visible light: B. infrared light: Give an example for each type of electromagnetic energy listed below.
- 10. Sample answers: A. ultraviolet light: Answer the spectrum of light we see as color C. visible light: B. infrared light: part of sunlight radiant heat
Editor's Notes
- The frequency and wavelength of light waves are inversely related. As the wavelength increases, the frequency decreases.
- The electromagnetic spectrum consists of radiation over a broad band of wavelengths. The visible light portion is very small. It is in the 10 -7 m wavelength range and 10 15 Hz (s -1 ) frequency range. Interpreting Diagrams What types of nonvisible radiation have wavelengths close to those of red light? To those of blue light?
- Sodium vapor lamps produce a yellow glow.
- A prism separates light into the colors it contains. For white light this produces a rainbow of colors.
- A prism separates light into the colors it contains. Light from a helium lamp produces discrete lines. Identifying Which color has the highest frequency?
- No two elements have the same emission spectrum. a) Mercury vapor lamps produce a blue glow. b) Nitrogen gas gives off a yellowish-orange light.
- The three groups of lines in the hydrogen spectrum correspond to the transition of electrons from higher energy levels to lower energy levels. The Lyman series corresponds to the transition to the n 1 energy level. The Balmer series corresponds to the transition to the n 2 energy level. The Paschen series corresponds to the transition to the n 3 energy level.