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Setup For Absorption Spectrum

Spectroscope (setup for Emission Spectrum). Setup For Absorption Spectrum. He Ne eHe eNe. -- Questions --. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The white light emitted by a fluorescent lamp is provided by the

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Setup For Absorption Spectrum

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  1. Spectroscope (setup for Emission Spectrum) Setup For Absorption Spectrum

  2. He Ne eHe eNe

  3. -- Questions -- MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

  4. 1) The white light emitted by a fluorescent lamp is provided by the • A) phosphors on the inner surface of the lamp. • B) high temperature of the glowing gas. • C) mercury vapor in the lamp. • D) filtering effect of the glass tubing. • 2) Light from a laser is • monochromatic. • B) coherent. • C) in phase. • D) all of these. • E) none of these.

  5. 3) An atom that absorbs a photon of a certain energy can then emit • A) only a photon of the same or lower energy. • B) a photon of any energy. • C) only a photon of that energy. • D) only a photon of the same or higher energy. • 4) Green light emitted by excited mercury vapor corresponds to a particular energy transition in the mercury atom. A more energetic transition might emit • white light. • B) either red or blue light. • C) blue light. • D) red light.

  6. 5) A traveling pulse of electromagnetic radiation is called a • proton. • lightron. • photon. • notron. • E) sparktron. • 6) The greater proportion of energy immediately converted to heat rather than light occurs in • an incandescent lamp. • a fluorescent lamp. • C) both the same.

  7. 7) Atoms of neon in a glass tube can be excited • over and over again. • B) once per atom. • 8) Materials can be heated until "red hot". If some material is heated until it is "green hot", then • A) energy conservation would be violated. • B) it would be hotter than "white hot". • C) its molecules would be vibrating at nearly identical rates. • D) it would liquify immediately. • E) it would be a strong absorber of red light .

  8. 9) Light from a phosphorescent source • A) normally has a shorter wavelength than the light that initially produced it. • B) is cooler than light from a fluorescent source. • C) takes longer to travel from the source to you. • D) all of these. • E) none of these. • 10) If light in a spectroscope were passed through a star-shaped opening instead of a thin slit, spectral lines would appear as • A) stars. • B) blobs of no definite shape. • C) lines, but with poorer resolution.

  9. 11) Which light source is more energy-efficient? • an incandescent lamp • a fluorescent lamp • C) both about the same • 12) The highest frequency light of those below is • A) blue. • B) red. • C) violet. • D) green. • E) all the same.

  10. 13) The main visible difference between phosphorescent and fluorescent materials is • A) an afterglow. • B) the greenish color of phosphorescence. • C) a difference in brightness. • 14) Fluorescent minerals on display in museums are illuminated with • infrared light. • B) ultraviolet light. • C) often either or both. • D) none of these.

  11. 15) In the process of fluorescence, the input is high-frequency light and the output is • A) equally high-frequency light. • B) lower-frequency light. • C) higher-frequency light. • 16) Which of the following continually emits electromagnetic radiation? • A) radio antennas • B) insects • C) red-hot coals • D) all of these • E) none of these

  12. -- Answers -- MULTIPLE CHOICE. The one alternative that best completes the statement or answers the question.

  13. Chapter 30 1) Answer: A 2) Answer: D 3) Answer: A 4) Answer: C 5) Answer: C 6) Answer: A 7) Answer: A 8) Answer: C 9) Answer: E 10) Answer: A 11) Answer: B 12) Answer: C 13) Answer: A 14) Answer: B 15) Answer: B 16) Answer: D

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