{"id":836,"date":"2021-03-10T10:59:06","date_gmt":"2021-03-10T10:59:06","guid":{"rendered":"https:\/\/shirishpathare.com\/?page_id=836"},"modified":"2024-08-18T07:53:30","modified_gmt":"2024-08-18T07:53:30","slug":"diffraction-2","status":"publish","type":"page","link":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/vigyan-vidushi\/diffraction-2\/","title":{"rendered":"Diffraction"},"content":{"rendered":"\n<p><strong>Aim<\/strong>: To determine the wavelength of Laser using one dimensional diffraction grating.<\/p>\n\n\n\n<p><strong>Apparatus used in the experiment<\/strong>: Laser, one dimensional diffraction grating, ruler, screen.<\/p>\n\n\n\n<p><strong>Apparatus to be used by you<\/strong>: 15cm or 30cm ruler.<\/p>\n\n\n\n<p><strong>Figure<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-style-default\"><a href=\"https:\/\/sites.hbcse.tifr.res.in\/shirish\/wp-content\/uploads\/2021\/03\/diffgrat_schema.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" data-id=\"840\" src=\"https:\/\/sites.hbcse.tifr.res.in\/shirish\/wp-content\/uploads\/2021\/03\/diffgrat_schema.jpg\" alt=\"\" class=\"wp-image-840\"\/><\/a><\/figure>\n<\/figure>\n\n\n\n<p><strong>Formula<\/strong>:<\/p>\n\n\n<div class=\"wp-block-image is-style-default\">\n<figure class=\"aligncenter size-large\"><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/untitled.png\"><img loading=\"lazy\" decoding=\"async\" width=\"174\" height=\"56\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/untitled.png?w=174\" alt=\"\" class=\"wp-image-838\"\/><\/a><\/figure>\n<\/div>\n\n\n<p>where, <\/p>\n\n\n\n<p><em>d<\/em> = grating element, <\/p>\n\n\n\n<p><em>n<\/em> = order of maxima, <\/p>\n\n\n\n<p><em>\u03b8<\/em> = angle between central maxima and first order maxima , <\/p>\n\n\n\n<p><em>\u03bb<\/em> = wavelength of laser<\/p>\n\n\n\n<p><strong>Procedure<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Setup for the experiment is as given below.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image is-style-default\">\n<figure class=\"aligncenter size-large\"><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_20210308_173503410_hdr.jpg\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_20210308_173503410_hdr.jpg?w=1024\" alt=\"\" class=\"wp-image-869\"\/><\/a><\/figure>\n<\/div>\n\n\n<ul id=\"block-4faf3225-7cb7-48d9-8843-2487a8b56ab3\" class=\"wp-block-list\">\n<li>Laser is focused on the screen and grating is placed between the laser source and screen.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image is-resized is-style-default\">\n<figure class=\"aligncenter size-large\"><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_20210308_173613382_hdr.jpg\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_20210308_173613382_hdr.jpg?w=575\" alt=\"\" class=\"wp-image-870\"\/><\/a><\/figure>\n<\/div>\n\n\n<ul id=\"block-117a1237-b69a-49ec-ad57-a6f4eb5ddefe\" class=\"wp-block-list\">\n<li>The photographs of diffraction pattern for different distances between the screen and the grating are given below.<\/li>\n\n\n\n<li>The distance between the grating and the screen, <em>D<\/em> is mentioned on each photograph, which can be seen by magnifying the photograph.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-coblocks-gallery-masonry alignwide\"><div class=\"coblocks-gallery has-caption-style-dark has-gutter has-lightbox\"><ul class=\"has-grid-med has-gutter-15 has-gutter-mobile-15\"><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3425-1.jpg?w=1024\" alt=\"\" data-id=\"845\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3425-1\/\" class=\"wp-image-845\" \/><figcaption class=\"coblocks-gallery--caption\">D= 17.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3426-1.jpg?w=1024\" alt=\"\" data-id=\"940\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3426-1\/\" class=\"wp-image-940\" \/><figcaption class=\"coblocks-gallery--caption\">D= 16.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3427-1.jpg?w=1024\" alt=\"\" data-id=\"942\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3427-1\/\" class=\"wp-image-942\" \/><figcaption class=\"coblocks-gallery--caption\">D= 15.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3428-1.jpg?w=1024\" alt=\"\" data-id=\"850\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3428-1\/\" class=\"wp-image-850\" \/><figcaption class=\"coblocks-gallery--caption\">D= 14.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3429.jpg?w=1024\" alt=\"\" data-id=\"851\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3429\/\" class=\"wp-image-851\" \/><figcaption class=\"coblocks-gallery--caption\">D= 13.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3430.jpg?w=1024\" alt=\"\" data-id=\"853\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3430\/\" class=\"wp-image-853\" \/><figcaption class=\"coblocks-gallery--caption\">D= 12.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3431.jpg?w=1024\" alt=\"\" data-id=\"854\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3431\/\" class=\"wp-image-854\" \/><figcaption class=\"coblocks-gallery--caption\">D= 11.0 cm<\/figcaption><\/figure><\/li><li class=\"coblocks-gallery--item\"><figure class=\"coblocks-gallery--figure\"><img decoding=\"async\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3432.jpg?w=1024\" alt=\"\" data-id=\"856\" data-imglink=\"\" data-link=\"https:\/\/shirishpathare.com\/img_3432\/\" class=\"wp-image-856\" \/><figcaption class=\"coblocks-gallery--caption\">D= 10.0 cm<\/figcaption><\/figure><\/li><\/ul><\/div><\/div>\n\n\n\n<ul id=\"block-4faf3225-7cb7-48d9-8843-2487a8b56ab3\" class=\"wp-block-list\">\n<li>Generate the data with 1% uncertainty in the measurement, from the photographs above.<\/li>\n\n\n\n<li>Plot a suitable graph and determine the wavelength of laser only from the slope of the graph.<\/li>\n\n\n\n<li>The grating used in the experiment has 12868 lines\/inches.<\/li>\n<\/ul>\n\n\n\n<p>Click below to download high resolution images (if needed):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3425.jpg\">Diffraction pattern for D = 17.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3426.jpg\">Diffraction pattern for D = 16.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3427.jpg\">Diffraction pattern for D = 15.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3428.jpg\">Diffraction pattern for D = 14.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3429.jpg\">Diffraction pattern for D = 13.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3430.jpg\">Diffraction pattern for D = 12.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3431.jpg\">Diffraction pattern for D = 11.0 cm<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/03\/img_3432.jpg\">Diffraction pattern for D = 10.0 cm<\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Observations<\/strong>:<\/p>\n\n\n\n<p>In order to get your response, we are providing you with a google form. So that, we can get an idea about <\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>your data collection techniques, <\/li>\n\n\n\n<li>variables chosen for measurements,<\/li>\n\n\n\n<li>your data and <\/li>\n\n\n\n<li>the graphs that you will  plot.<\/li>\n<\/ol>\n\n\n\n<p>The google form: <a rel=\"noreferrer noopener\" href=\"https:\/\/docs.google.com\/forms\/d\/1LkTVewvaICMcGZBV__vBta59x6j2IIC5sFdiNBCzZCM\/edit\" target=\"_blank\">https:\/\/docs.google.com\/forms\/d\/1LkTVewvaICMcGZBV__vBta59x6j2IIC5sFdiNBCzZCM\/edi<\/a><\/p>\n\n\n\n<p>Use the spreadsheet for calculations if needed: <a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/05\/spreadsheet.xlsx\">spreadsheet<\/a><\/p>\n\n\n\n<p>You may download the graph sheet to plot the graph: <a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/05\/graph.pdf\">Graph Sheet<\/a><\/p>\n\n\n\n<p><strong>Note: <\/strong><\/p>\n\n\n\n<p>What is meant by 1% uncertainty in the measurement of data?<\/p>\n\n\n\n<p>When we say that we want to measure a variable, <em>y<\/em> with 1% uncertainty, it means that <\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/05\/screenshot-2021-05-31-at-12.46.46-pm.png\"><img loading=\"lazy\" decoding=\"async\" width=\"274\" height=\"170\" src=\"http:\/\/158.144.44.204\/shirish\/wp-content\/uploads\/2021\/05\/screenshot-2021-05-31-at-12.46.46-pm.png?w=274\" alt=\"\" class=\"wp-image-1197\" style=\"width:98px;height:61px\"\/><\/a><\/figure>\n\n\n\n<p>It means that the measured quantity is at least 100 times the least count.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aim: To determine the wavelength of Laser using one dimensional diffraction grating. Apparatus used in the experiment: Laser, one dimensional diffraction grating, ruler, screen. Apparatus to be used by you: 15cm or 30cm ruler. Figure: Formula: where, d = grating element, n = order&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":1026,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-836","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/pages\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/comments?post=836"}],"version-history":[{"count":2,"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/pages\/836\/revisions"}],"predecessor-version":[{"id":1333,"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/pages\/836\/revisions\/1333"}],"up":[{"embeddable":true,"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/pages\/1026"}],"wp:attachment":[{"href":"https:\/\/sites.hbcse.tifr.res.in\/shirish\/index.php\/wp-json\/wp\/v2\/media?parent=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}