1.0Ask Rozhttps://www.askroz.com.au/blogAsk Roz AUhttps://www.askroz.com.au/blog/author/ask-roz-au/rich600338<blockquote class="wp-embedded-content" data-secret="TJvcxSTNix"><a href="https://www.askroz.com.au/blog/why-are-the-blue-mountains-blue/">Why are the Blue Mountains Blue</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.askroz.com.au/blog/why-are-the-blue-mountains-blue/embed/#?secret=TJvcxSTNix" width="600" height="338" title="“Why are the Blue Mountains Blue” — Ask Roz" data-secret="TJvcxSTNix" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.askroz.com.au/blog/wp-includes/js/wp-embed.min.js /* ]]> */ </script> The blue look associated with the Blue Mountains is caused by "Rayleigh Scattering". Rayleigh scattering refers to the scattering of light off of the molecules of the air, and can be extended to scattering from particles up to about a tenth of the wavelength of the light. It is Rayleigh scattering off the molecules of the air which gives us the blue sky and the reddening of the Sun at sunset.https://www.askroz.com.au/blog/wp-content/uploads/2022/08/297239369_5451697014873674_5015240219153225785_n.jpg