Skip to content

PRO TIP Block youtube.com at the DNS level — Pi-hole, NextDNS or your hosts file — but allow youtube-nocookie.com and i.ytimg.com. These tutorials keep playing; the rabbit hole does not.

Learning without distractions

Physics – Optics: Lensmaker’s Equation (3 of 5) NOTE ERROR: should be: (n1-n)/n = (1.5-1.33)/1.33

29.9K views on YouTube

Visit http://ilectureonline.com for more math and science lectures!

In this video I will show you how to find the focal length of a lens using the lensmaker’s equation.