NEET > Physics Class 12 > Atomic Spectra & Spectral Lines
Atomic Spectra & Spectral Lines Video Lecture - Physics Class 12 - NEET
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FAQs on Atomic Spectra & Spectral Lines Video Lecture - Physics Class 12 - NEET
| 1. What are atomic spectra and spectral lines? |  |
Ans. Atomic spectra refer to the unique patterns of light emitted or absorbed by atoms when their electrons transition between different energy levels. Spectral lines, on the other hand, are the specific wavelengths of light that are either emitted or absorbed by atoms during these transitions.
| 2. How are atomic spectra and spectral lines produced? | |
Ans. Atomic spectra and spectral lines are produced when the electrons in an atom gain or lose energy and transition between different energy levels. These transitions emit or absorb photons of specific energies, resulting in the emission or absorption of light at specific wavelengths, which are observed as spectral lines.
| 3. Why are atomic spectra and spectral lines important in chemistry and physics? | |
Ans. Atomic spectra and spectral lines are crucial in chemistry and physics as they provide valuable information about the structure and behavior of atoms. By studying the patterns and positions of spectral lines, scientists can determine the elemental composition of substances, identify unknown elements, investigate the energy levels of electrons, and even analyze the temperature and composition of stars and galaxies.
| 4. How can atomic spectra and spectral lines be used in practical applications? | |
Ans. Atomic spectra and spectral lines find various practical applications. For instance, they are used in astronomy to determine the composition and temperature of celestial bodies. In forensic science, spectral analysis can help identify trace elements present at a crime scene. Additionally, atomic absorption spectroscopy is utilized to measure the concentration of specific elements in environmental samples, food, and pharmaceuticals.
| 5. What is the connection between atomic spectra and the quantized nature of energy in atoms? | |
Ans. The connection between atomic spectra and the quantized nature of energy in atoms lies in the fact that the energy levels of electrons in atoms are discrete and can only have specific values. When electrons transition between these energy levels, they emit or absorb photons of specific energies. These energy differences between the levels correspond to specific wavelengths of light, which result in the observed spectral lines in the atomic spectra. This phenomenon is a direct consequence of the quantized nature of energy in atoms.
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