Annihilation - Revision history

NRJC at 19:11, 19 May 2024

2024-05-19T19:11:52Z

NRJC: /* About Annihilation */

2024-05-19T19:11:08Z

‎About Annihilation

NRJC at 09:17, 19 May 2024

2024-05-19T09:17:51Z

NRJC: /* About Annihilation */

2024-05-19T09:17:30Z

‎About Annihilation

NRJC: /* Examples */

2024-05-19T09:15:32Z

‎Examples

NRJC at 09:15, 19 May 2024

2024-05-19T09:15:24Z

NRJC: /* Examples */

2024-05-19T09:14:26Z

‎Examples

NRJC: /* Key Stage 5 */

2024-05-19T09:13:49Z

‎Key Stage 5

NRJC at 09:12, 19 May 2024

2024-05-19T09:12:38Z

NRJC at 18:41, 23 January 2021

2021-01-23T18:41:16Z

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 *'''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
 *Follows the principle of [[Mass-Energy Equivalence|mass-energy equivalence]] (E=mc²).
 *During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s before the event is equal to the total [[energy]] of the products (two [[Gamma-ray|gamma ray]] [[photon]]s in a-level physics) after the event.
 *In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.
-*Results in the production of [[Gamma-ray|gamma rays]] or other [[Subatomic Particle|particles]]. However, for a-level physics, you only need to consider the special case of 2 [[Gamma-ray|gamma ray]] [[photon]]s being [[emit]]ted.
 ===Equation===

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 *'''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
 *Follows the principle of [[Mass-Energy Equivalence|mass-energy equivalence]] (E=mc²).
-*During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s is equal to the total [[energy]] of the two [[Gamma-ray|gamma ray]] [[photon]]s.
+*During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s before the event is equal to the total [[energy]] of the products (two [[Gamma-ray|gamma ray]] [[photon]]s in a-level physics) after the event.
 *In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.
 *Results in the production of [[Gamma-ray|gamma rays]] or other [[Subatomic Particle|particles]]. However, for a-level physics, you only need to consider the special case of 2 [[Gamma-ray|gamma ray]] [[photon]]s being [[emit]]ted.

@@ Line 5: / Line 5: @@
 ===About Annihilation===
 *'''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
-*Follows the principle of [[mass-energy equivalence]] (E=mc²).
+*Follows the principle of [[Mass-Energy Equivalence|mass-energy equivalence]] (E=mc²).
 *During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s is equal to the total [[energy]] of the two [[Gamma-ray|gamma ray]] [[photon]]s.
 *In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.

@@ Line 5: / Line 5: @@
 ===About Annihilation===
 *'''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
 *During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s is equal to the total [[energy]] of the two [[Gamma-ray|gamma ray]] [[photon]]s.
 *In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.
-*For a-level physics you only need to consider the special case of 2 [[Gamma-ray|gamma ray]] [[photon]]s being [[emit]]ted.
+*Results in the production of [[Gamma-ray|gamma rays]] or other [[Subatomic Particle|particles]]. However, for a-level physics, you only need to consider the special case of 2 [[Gamma-ray|gamma ray]] [[photon]]s being [[emit]]ted.
 ===Equation===

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 ===Examples===
-[[Positron Emission Tomorgraph|Positron emission tomography]] ([[Positron Emission Tomography|PET]]) scans detect [[Gamma-ray|gamma rays]] from [[electron]]-[[positron]] [[annihilation]].
+*[[Positron Emission Tomorgraph|Positron emission tomography]] ([[Positron Emission Tomography|PET]]) scans detect [[Gamma-ray|gamma rays]] from [[electron]]-[[positron]] [[annihilation]].
-[[Particle Accelerator|Particle accelerators]] study [[annihilation]] events to understand [[Fundamental Particle|fundamental particles]].
+*[[Particle Accelerator|Particle accelerators]] study [[annihilation]] events to understand [[Fundamental Particle|fundamental particles]].

← Older revision		Revision as of 09:13, 19 May 2024
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	<math>E_k</math> = The [[Kinetic Energy\|kinetic energy]] of the particle		<math>E_k</math> = The [[Kinetic Energy\|kinetic energy]] of the particle
		+
		+	===Examples===
		+
		+	[[Positron [[Emit\|emission]] tomography]] (PET) scans detect [[gamma rays]] from [[electron]]-[[positron]] [[annihilation]].
		+	[[Particle accelerators]] study [[annihilation]] events to understand fundamental particles.

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 ==Key Stage 5==
 ===Meaning===
-'''Annihilation''' is the process in which [[matter]] and [[antimatter]] interact converting all their [[Rest Mass|rest mass]] into [[energy]] resulting in a pair of [[Gamma-ray|gamma ray]] [[photon]]s being emitted in opposite directions.
+'''Annihilation''' is the process in which [[matter]] and [[antimatter]] interact converting all their [[Rest Mass|rest mass]] into [[energy]] resulting in two or more [[Gamma-ray|gamma ray]] [[photon]]s being emitted in opposite directions.
 ===About Annihilation===
-: '''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
+*'''Annihilation''' occurs when [[particle]]s of [[matter]] and [[antimatter]] interact at extremely close range.
-: During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s is equal to the total [[energy]] of the two [[Gamma-ray|gamma ray]] [[photon]]s.
+*During '''annihilation''' the total [[Rest Mass|rest mass]], as well as the [[Kinetic Energy|kinetic energy]], of the [[particle]]s is equal to the total [[energy]] of the two [[Gamma-ray|gamma ray]] [[photon]]s.
-: In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the two [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.
+*In '''annihilation''' [[Conservation of Momentum|conservation of momentum]] is conserved due to the [[momentum]] of the [[Gamma-ray|gamma ray]] [[photon]]s travelling in opposite directions.
 ===Equation===