Concave Lens - Revision history

NRJC at 16:47, 17 December 2019

2019-12-17T16:47:29Z

Ellen References at 14:58, 3 December 2019

2019-12-03T14:58:15Z

Ellen References at 14:44, 3 November 2019

2019-11-03T14:44:14Z

NRJC at 11:25, 8 April 2019

2019-04-08T11:25:03Z

NRJC: /* Ray Diagrams */

2019-02-24T12:43:20Z

‎Ray Diagrams

NRJC: /* Ray Diagrams */

2019-02-24T12:42:59Z

‎Ray Diagrams

NRJC at 12:42, 24 February 2019

2019-02-24T12:42:25Z

NRJC: Created page with "==Key Stage 4 Higher== ===Meaning=== A '''convex''' lens is a shaped piece of glass that is thickest at the centre and thinnest at the edges. {| class="wikitable" |-..."

2019-02-24T12:40:46Z

Created page with "==Key Stage 4 Higher== ===Meaning=== A '''convex''' lens is a shaped piece of glass that is thickest at the centre and thinnest at the edges. {| class="wikitable" |-..."

New page

==Key Stage 4 Higher==
===Meaning===
A '''convex''' [[lens]] is a shaped piece of [[glass]] that is thickest at the centre and thinnest at the edges.

{| class="wikitable"
|-
|[[File:ConcaveLens.png|center|100px]]
|[[File:ConcaveLensSymbol.png|center|100px]]
|-
| style="height:20px; width:200px; text-align:center;" |A picture of a '''concave lens'''.
| style="height:20px; width:200px; text-align:center;" |The symbol used in [[diagram]]s to represent a '''concave lens'''
|}

===About Concave Lenses===
: A '''concave lens''' causes [[parallel]] [[Light Ray|rays]] of [[light]] to [[diverge]], so it can also be called a [[Diverging Lens|diverging lens]].
: A '''concave''' [[lens]] cannot be used to [[focus]] [[light]]. However, they are used in [[glasses]] to correct the [[focus]]sing of a [[lens]] in the [[eye]].
: '''Concave [[lens]]es''' produce a [[Virtual Image|virtual image]].

===Focal Length of a Concave Lens===
{| class="wikitable"
|-
|[[File:ConcaveLensFocalPoint.png|center|500px]]
|-
| style="height:20px; width:200px; text-align:center;" |A '''concave lens''' causes [[parallel]] [[Light Ray|rays]] to [[diverge]]. The [[Focal Point|focal point]] for the '''concave lens''' is on the same side of the [[lens]] as the [[object]].
|}
: The [[Focal Length|focal length]] of a '''concave lens''' is the distance between the [[Focal Point|focal point]] and the centre of the [[lens]]. However, this cannot be [[measured]] through experiment.

===Ray Diagrams===
{| class="wikitable"
|-
|[[File:ConcaveRayDiagram.png|center|500px]]
|-
| style="height:20px; width:200px; text-align:center;" |A [[Ray Diagram|ray diagram]] for a '''concave [[lens]]'''.

In this [[diagram]]:

"Ray 1" is traced backwards after being [[refract]]ed by the [[lens]].

"Ray 2" is shown passing through the centre of the [[lens]]. This ray is also traced backwards.

The [[diagram]] shows that a [[diminish]]ed [[Virtual Image|virtual image]] is produced at the point that the 'traced' lines from "ray 1" and "ray 2" cross one another.
|}

← Older revision		Revision as of 14:58, 3 December 2019
Line 51:		Line 51:
	:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac60 ''Concave lenses, pages 82, 84, GCSE Physics; The Revision Guide, CGP, AQA '']		:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac60 ''Concave lenses, pages 82, 84, GCSE Physics; The Revision Guide, CGP, AQA '']
	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Concave lenses; refraction of light, page 203, GCSE Physics, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Concave lenses; refraction of light, page 203, GCSE Physics, Hodder, AQA '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Concave (diverging) lenses, pages 162, Gateway GCSE Physics, Oxford, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Concave lenses, pages 71, 72, Gateway GCSE Physics; The Revision Guide, CGP, OCR '']

← Older revision		Revision as of 14:44, 3 November 2019
Line 41:		Line 41:
	The [[diagram]] shows that a [[diminish]]ed [[Virtual Image\|virtual image]] is produced at the point that the 'traced' lines from "ray 1" and "ray 2" cross one another.		The [[diagram]] shows that a [[diminish]]ed [[Virtual Image\|virtual image]] is produced at the point that the 'traced' lines from "ray 1" and "ray 2" cross one another.
	\|}		\|}
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Concave lenses, page 206, GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Concave lenses, page 71, GCSE Biology; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Concave lenses, pages 208-211, GCSE Physics; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Concave lenses, pages 267, 268, 273, 274, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac60 ''Concave lenses, pages 82, 84, GCSE Physics; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Concave lenses; refraction of light, page 203, GCSE Physics, Hodder, AQA '']

@@ Line 31: / Line 31: @@
 |[[File:ConcaveRayDiagram1.png|center|500px]]
 |-
-| style="height:20px; width:200px; text-align:center;" |A [[Ray Diagram|ray diagram]] for a '''concave [[lens]]'''.
+| style="height:20px; width:200px; text-align:left;" |A [[Ray Diagram|ray diagram]] for a '''concave [[lens]]'''.
 In this [[diagram]]:

@@ Line 1: / Line 1: @@
 ==Key Stage 4 Higher==
 ===Meaning===
-A '''convex''' [[lens]] is a shaped piece of [[glass]] that is thickest at the centre and thinnest at the edges.
+A '''concave''' [[lens]] is a shaped piece of [[glass]] that is thickest at the edges and thinnest at the centre.
 {| class="wikitable"

@@ Line 14: / Line 14: @@
 ===About Concave Lenses===
 : A '''concave lens''' causes [[parallel]] [[Light Ray|rays]] of [[light]] to [[diverge]], so it can also be called a [[Diverging Lens|diverging lens]].
-: A '''concave''' [[lens]] cannot be used to [[focus]] [[light]]. However, they are used in [[glasses]] to correct the [[focus]]sing of a [[lens]] in the [[eye]].
+: A '''concave''' [[lens]] cannot be used to [[focus]] [[light]]. However, they are used in glasses to correct the [[focus]]sing of a [[lens]] in the [[eye]].
 : '''Concave [[lens]]es''' produce a [[Virtual Image|virtual image]].

@@ Line 6: / Line 6: @@
 |-
 |[[File:ConcaveLens.png|center|100px]]
-|[[File:ConcaveLensSymbol.png|center|100px]]
+|[[File:ConcaveLensDiagram.png|center|100px]]
 |-
 | style="height:20px; width:200px; text-align:center;" |A picture of a '''concave lens'''.