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Excited atoms absorb and reemit radiation at characteristic frequencies because the electrons in the atom can only occupy specific energy levels. When an atom absorbs energy and its electrons are excited to higher energy levels, they will subsequently drop back to their original energy levels by emitting photons with specific frequencies that are unique to that atom. This results in the emission of radiation at characteristic frequencies.
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Why do excited atoms absorb and reemit radiation at characteristic frequencies?
As described by the Bohr model, the energy levels in an atom have discrete and characteristic energies. Transitions from one energy level to another correspond to emission or absorption of a photon with a characteristic energy that is exactly equal to the difference in atomic energy levels. Since the energy of a photon is defined by it’s frequency, the emitted or absorbed photons have characteristic frequencies corresponding to the difference in energy between the atomic energy levels.
What are absorbers of radiation?
Absorbers of radiation are materials or substances that are capable of absorbing and reducing the transmission of electromagnetic radiation. These materials can include metals, gases, and compounds that absorb specific frequencies of radiation. Absorbers of radiation are used in various applications such as shielding against harmful radiation or in sensors for detecting radiation levels.
Do all objects absorb infra red radiation?
No, not all objects absorb infrared radiation. The ability of an object to absorb infrared radiation depends on its material properties. Different materials have different levels of absorption and reflection of infrared radiation.
When an electron gets excited is energy released or absorbed?
When an electron gets excited, energy is absorbed to move the electron to a higher energy level. This absorbed energy gets released when the electron returns to its original energy level, emitting electromagnetic radiation such as light.
All objects emit and absorb radiant energy?
Theoretically false. An object at the temp of absolute zero would emit no energy or radiation. However, absolute zero does not exist in nature (as far as we know), therefor, in a practical sense the statement is true.
Do all molecules absorb electromagnetic radiation at some frequency?
No, not all molecules absorb electromagnetic radiation at a distinct frequency. The ability of a molecule to absorb radiation depends on its structure and the energy levels of its electrons. Molecules with specific functional groups or electronic configurations exhibit absorption at characteristic frequencies.
Why do excited atoms absorb and reemit radiation at characteristic frequencies?
As described by the Bohr model, the energy levels in an atom have discrete and characteristic energies. Transitions from one energy level to another correspond to emission or absorption of a photon with a characteristic energy that is exactly equal to the difference in atomic energy levels. Since the energy of a photon is defined by it’s frequency, the emitted or absorbed photons have characteristic frequencies corresponding to the difference in energy between the atomic energy levels.
What is the frequency of a hydrogen atom?
An atom doesn't have a frequency. It can vibrate with many different frequencies. It can absorb radiation of different frequencies under different circumstances. For instance, electrons moving between various energy levels absorb and release characteristic frequencies of visible and ultra-violet light, and in a magnetic field radio frequency energy can be absorbed as the nucleus moves from one spin state to another. Bonds between hydrogen and other atoms absorb energies in the infra red. All these things give spectra of various frequencies, not an individual frequency.
What happens to molecules if they receive electromagnetic radiation?
They are excited and their energy increases and possibly ejects an electron and change their size and shape..They will often absorb part of the radiation; in that case, their energy will increase.
What are absorbers of radiation?
Absorbers of radiation are materials or substances that are capable of absorbing and reducing the transmission of electromagnetic radiation. These materials can include metals, gases, and compounds that absorb specific frequencies of radiation. Absorbers of radiation are used in various applications such as shielding against harmful radiation or in sensors for detecting radiation levels.
Do cacti absorb radiation from their environment?
No, cacti do not absorb radiation from their environment. They do not have the ability to absorb radiation like some other plants.
Why oxygen and nitrogen are not greenhouse gas?
Different molecules have different characteristic vibrational frequencies for their interatomic bonds. They absorb energy that matches that frequency. The vibrational frequencies for O2 and N2 bonds don't match the main wavelengths of the energy coming from the sun or radiating back out from the earth. Water (~98 of the greenhouse effect is from water vapor) and other greenhouse gases DO have vibrational frequencies that match that energy and thus readily absorb it.
Does methane absorb infrared radiation?
Yes, methane does absorb infrared radiation.
What don't atoms radiate?
Atoms do not radiate continuously because electrons exist in quantized energy levels that require a specific amount of energy to transition between levels. When an electron transitions between levels, it may emit or absorb a discrete amount of energy in the form of photons, resulting in characteristic spectral lines. Atoms are stable in their ground state and only emit radiation when excited.
Which layer of the atmosphere does not absorb solar radiation?
Troposphere does not absorb solar radiation. All other layers do not absorb.
Do all objects absorb infra red radiation?
No, not all objects absorb infrared radiation. The ability of an object to absorb infrared radiation depends on its material properties. Different materials have different levels of absorption and reflection of infrared radiation.
What measurement would you use to measure a stars elemental composition?
If you want to know the elemental composition of a star, you look for the elements' fingerprints. These are in the form of line spectra, since each element has its own particular set of spectral lines. Atoms in the star's atmosphere will absorb their characteristic frequencies from the cavity radiation emitted from the star due to its temperature. Color
