Diffraction Grating - Revision history

NRJC: /* Formula */

2024-05-23T17:31:50Z

‎Formula

NRJC: /* About Diffraction Gratings */

2024-05-23T17:31:33Z

‎About Diffraction Gratings

NRJC: /* About Diffraction Gratings */

2024-05-23T17:31:13Z

‎About Diffraction Gratings

NRJC at 17:27, 23 May 2024

2024-05-23T17:27:19Z

NRJC: Created page with "==Key Stage 5== ===Meaning=== A diffraction grating is a plate with many closely ruled parallel slits that disperses white light into..."

2024-05-23T17:24:36Z

Created page with "==Key Stage 5== ===Meaning=== A diffraction grating is a plate with many closely ruled parallel slits that disperses white light into..."

New page

==Key Stage 5==
===Meaning===
A [[Diffraction Grating|diffraction grating]] is a plate with many closely ruled parallel slits that disperses white [[Visible Light|light]] into a spectrum or produce several diverging beams from a single [[laser]] beam.

===About Diffraction Gratings===
*'''Diffraction gratings''' produce multiple [[Diffraction Order|diffraction orders]] for a single [[monochromatic]] beam of [[laser]] [[Visible Light|light]].
*When white light is incident upon a '''diffraction grating''' it will produce a single white band of light in the centre of the screen followed by a series of repeating spectra. As the distance from the centre of the screen increases with violet closest to the centre and red furthest.
*'''Diffraction Gratings''' can resolve very fine details in the spectrum, making them useful in spectroscopy.

===Formula===
*The [[diffraction]] angle depends on the [[wavelength]] of the [[Visible Light|light]] and the [[Grating Spacing|spacing of the slits]] with the relation given by this formula:

*<math>𝑑sin𝜃=𝑛𝜆</math>

Where:

𝑑 is the slit spacing (though frequently the number of slits per mm is given and this must be calculated first)

𝜃 is the angle between the beam order and the central axis

𝑛 is the beam order with the zeroth beam order being along the central axis and the first beam order being smallest angle from beam to central axis

𝜆 is the [[wavelength]] of the beam

@@ Line 10: / Line 10: @@
 {| class="wikitable"
 |-
-|[[File:DiffractionGratingExperimentRed.png|center|300px]]
+|[[File:DiffractionGratingExperimentRed.png|center|400px]]
 | style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating''' splitting a red [[laser]] beam into a zeroth, first, second and third order beam.
 |-
-|[[File:DiffractionGratingExperimentGreen.png|center|300px]]
+|[[File:DiffractionGratingExperimentGreen.png|center|400px]]
 | style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating''' splitting a green [[laser]] beam into a zeroth, first, second, third and fourth order beam.
 |-
-|[[File:DiffractionGratingExperimentBlue.png|center|300px]]
+|[[File:DiffractionGratingExperimentBlue.png|center|400px]]
 | style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating''' splitting a green [[laser]] beam into a zeroth, first, second, third, fourth and fifth order beam.
 |}

@@ Line 10: / Line 10: @@
 {| class="wikitable"
 |-
-|[[File:DiffractionGratingExperimentRed.png|center|150px]]
+|[[File:DiffractionGratingExperimentRed.png|center|300px]]
-|[[File:DiffractionGratingExperimentGreen.png|center|150px]]
+| style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating''' splitting a red [[laser]] beam into a zeroth, first, second and third order beam.
 |-
-| style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating'''
+|[[File:DiffractionGratingExperimentGreen.png|center|300px]]
-| style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating'''
+| style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating''' splitting a green [[laser]] beam into a zeroth, first, second, third and fourth order beam.
-| style="height:20px; width:150px; text-align:center;" |This image shows a '''diffraction grating'''
+|-
 |}
 ===Formula===
 *The [[diffraction]] angle depends on the [[wavelength]] of the [[Visible Light|light]] and the [[Grating Spacing|spacing of the slits]] with the relation given by this formula: