Difference between revisions of "Absorb (physics)"
(→About Absorption) |
(→About Absorption) |
||
(One intermediate revision by the same user not shown) | |||
Line 45: | Line 45: | ||
*[[Material]]s have specific [[Absorption Spectra|absoption spectra]] indicating which [[wavelength]]s they [[Absorb (Physics)|absorb]]. | *[[Material]]s have specific [[Absorption Spectra|absoption spectra]] indicating which [[wavelength]]s they [[Absorb (Physics)|absorb]]. | ||
*[[Absorb (Physics)|Absorbtion]] of [[Visible Light|light]] occurs when the [[energy]] of the [[photon]] is transferred to an [[electron]] in the [[Absorb (Physics)|absorbing]] material. | *[[Absorb (Physics)|Absorbtion]] of [[Visible Light|light]] occurs when the [[energy]] of the [[photon]] is transferred to an [[electron]] in the [[Absorb (Physics)|absorbing]] material. | ||
− | *In [[gas]]es, [[absorption]] lines in the [[ | + | *In [[gas]]es, [[Absorb (Physics)|absorption]] lines in the [[Absorption Spectra|spectrum]] are due to transitions between [[energy]] levels in [[atom]]s or [[molecule]]s. |
− | *[[Absorb|Absorbtion]] coefficients quantify how much [[Visible Light|light]] is [[Absorb (Physics)|absorbed]] per unit distance in a material. | + | *[[Absorb (Physics)|Absorbtion]] coefficients quantify how much [[Visible Light|light]] is [[Absorb (Physics)|absorbed]] per unit distance in a material. |
*Applications include [[Absorb (Physics)|absorption]] spectroscopy, which is used to determine the composition of substances. | *Applications include [[Absorb (Physics)|absorption]] spectroscopy, which is used to determine the composition of substances. | ||
Latest revision as of 10:17, 19 May 2024
Contents
Key Stage 3
Meaning
Absorption is when the energy being transferred by a wave is taken into an energy store of a material.
Key Stage 4
Meaning
Absorption is when the energy being transmitted by a wave is taken into an energy store of a material.
About Absorption
- When a wave is absorbed the wave ceases to exist and the energy being transmitted by that wave increases an energy store of the absorbing material.
- Absorption happens at the interface between two media.
- Black objects absorb light increasing their thermal energy store.
- Soft objects absorb sound increasing their thermal energy store.
- The colour of an object is caused by some frequencies of light being absorbed while others are reflected.
References
AQA
- Absorption of waves, pages 189-90, 195, GCSE Physics, Hodder, AQA
- Absorption, pages 27-29, 179, 206-207, GCSE Physics; Third Edition, Oxford University Press, AQA
- Absorption; lines, page 111, GCSE Physics; Student Book, Collins, AQA
Edexcel
- Absorbed waves, page 56, GCSE Physics, Pearson Edexcel
- Absorption of radiation, page 320, GCSE Combined Science, Pearson Edexcel
- Absorption of radiation, page 38, GCSE Physics, Pearson Edexcel
- Absorption of waves, pages 98, 128, 141-144, GCSE Physics, CGP, Edexcel
- Absorption of waves; colour of objects, page 137, GCSE Physics, CGP, Edexcel
- Absorption spectra, pages 191, 192, GCSE Physics, CGP, Edexcel
- Absorption spectrum, page 359, GCSE Combined Science, Pearson Edexcel
- Absorption spectrum, page 95, GCSE Physics, Pearson Edexcel
- Absorption, pages 34, 40, GCSE Physics; The Revision Guide, CGP, Edexcel
OCR
Key Stage 5
Meaning
Absorbtion is the process where matter takes in photons, particles, or energy.
About Absorption
- Absorbtion involves the transfer of energy from the electromagnetic wave to the material.
- It can occur in various forms, such as the absorption of light, sound, or other radiation.
- Materials have specific absoption spectra indicating which wavelengths they absorb.
- Absorbtion of light occurs when the energy of the photon is transferred to an electron in the absorbing material.
- In gases, absorption lines in the spectrum are due to transitions between energy levels in atoms or molecules.
- Absorbtion coefficients quantify how much light is absorbed per unit distance in a material.
- Applications include absorption spectroscopy, which is used to determine the composition of substances.
Examples
- Solar panels absorb sunlight to convert it into electricity.
- Dark-coloured objects absorb more visible light and therefore heat up faster than light-coloured objects.