{"id":13538,"date":"2025-12-06T09:19:06","date_gmt":"2025-12-06T06:19:06","guid":{"rendered":"https:\/\/academia.treesal.com\/?post_type=course&#038;p=13538"},"modified":"2026-03-12T14:12:46","modified_gmt":"2026-03-12T11:12:46","slug":"chapter6-2","status":"publish","type":"course","link":"https:\/\/academia.treesal.com\/en\/course\/chapter6-2\/","title":{"rendered":"Chapter6 : Optics and Vision"},"content":{"rendered":"<p class=\"sensei-content-description wp-block-paragraph\"><\/p>\n\n\n<div class=\"sensei-block-wrapper sensei-cta wp-block-sensei-lms-button-take-course\">\n\t\t\t<form action=\"\/en\/wp-json\/wp\/v2\/courses\/13538?add-to-cart=24103\" method=\"post\" enctype=\"multipart\/form-data\" data-trp-original-action=\"\/en\/wp-json\/wp\/v2\/courses\/13538?add-to-cart=24103\">\n\t\t\t\t<input type=\"hidden\" name=\"product_id\" value=\"24103\" \/>\n\t\t\t\t<input type=\"hidden\" name=\"quantity\" value=\"1\" \/>\n\t\t\t\t\n\t\t\t\t\n<div class=\"wp-block-sensei-lms-button-take-course is-style-default wp-block-sensei-button wp-block-button has-text-align-left\"><button  class=\"wp-block-button__link\" data-original-text=\"Buy\">Buy &#8211; <span class=\"woocommerce-Price-amount amount\">10,00&nbsp;<span class=\"woocommerce-Price-currencySymbol\">&#8362;<\/span><\/span><\/button><\/div>\n\n\t\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"en\"\/><\/form><\/div>\n\n\n\n\n\t\t\t<section class=\"wp-block-sensei-lms-course-outline sensei-block-wrapper  is-style-default\" style=\"\">\n\t\t\t\t\n\t\t\t<section class=\"wp-block-sensei-lms-course-outline-module sensei-collapsible  is-style-default wp-block-sensei-lms-course-outline-module-bordered border-color-primary\" style=\"border-color: rgb(2, 103, 190);\">\n\t\t\t\t<header class=\"wp-block-sensei-lms-course-outline-module__header has-text-color has-background-color has-background has-primary-background-color\" style=\"\">\n\t\t\t\t\t<h2 class=\"wp-block-sensei-lms-course-outline-module__title\">Chapter6.1 Geometric Optics<\/h2>\n\t\t\t\t\t<button type=\"button\" class=\"wp-block-sensei-lms-course-outline__arrow sensei-collapsible__toggle\" aria-expanded=\"true\">\n\t\t\t\t\t\t<svg class=\"\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-up\"><\/use><\/svg>\n\t\t\t\t\t\t<span class=\"screen-reader-text\">Chapter6.1 Geometric Optics<\/span>\n\t\t\t\t\t<\/button><\/header>\n\t\t\t\t\t\n\t\t\t\t<div class=\"wp-block-sensei-lms-collapsible sensei-collapsible__content\">\n\t\t\t\t\t\n\t\t\t\t\t<h3 class=\"wp-block-sensei-lms-course-outline-module__lessons-title\">\n\t\t\t\t\t\tLessons\n\t\t\t\t\t<\/h3>\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-1-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-1 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-2-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-2 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-3-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-3 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-4-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-4 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-4-mcq-2\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-5 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-6-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-6 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-1-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-1 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-2-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-2 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-3-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-3 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-1-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-1 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-2-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1-2 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-1-problem-solving\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.1 Problem Solving\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/section>\n\t\t\n\t\t\t<section class=\"wp-block-sensei-lms-course-outline-module sensei-collapsible  is-style-default wp-block-sensei-lms-course-outline-module-bordered border-color-primary\" style=\"border-color: rgb(2, 103, 190);\">\n\t\t\t\t<header class=\"wp-block-sensei-lms-course-outline-module__header has-text-color has-background-color has-background has-primary-background-color\" style=\"\">\n\t\t\t\t\t<h2 class=\"wp-block-sensei-lms-course-outline-module__title\">Chapter6.2 Ray Diagram Concepts<\/h2>\n\t\t\t\t\t<button type=\"button\" class=\"wp-block-sensei-lms-course-outline__arrow sensei-collapsible__toggle\" aria-expanded=\"true\">\n\t\t\t\t\t\t<svg class=\"\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-up\"><\/use><\/svg>\n\t\t\t\t\t\t<span class=\"screen-reader-text\">Chapter6.2 Ray Diagram Concepts<\/span>\n\t\t\t\t\t<\/button><\/header>\n\t\t\t\t\t\n\t\t\t\t<div class=\"wp-block-sensei-lms-collapsible sensei-collapsible__content\">\n\t\t\t\t\t\n\t\t\t\t\t<h3 class=\"wp-block-sensei-lms-course-outline-module__lessons-title\">\n\t\t\t\t\t\tLessons\n\t\t\t\t\t<\/h3>\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-1-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-1 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-2-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-2 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-3-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-3 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-4-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-4 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-5-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-5 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-6-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-6 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-7-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-7 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-1-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-1 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-2-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-2 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-3-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2-3 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch6-2-problem-solving\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh6.2 Problem Solving\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/section>\n\t\t\n\t\t\t<\/section>\n\t\t\n\n\n<p 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