Geometric Optics: Crash Course Physics #38

LIGHT! Let's talk about it today. Sunlight, moonlight, torchlight, and flashlight. They all come from different places, but they’re the very same thing: light! It’s what makes it possible for us to see the world around us, so it’s worth a close, hard look. For instance, how does light travel? When you flip that switch in the bathroom to brush your teeth, how does light move from the light bulb, to the mirror, and into your eyes?

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[crashcourse]

We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!

[PeachyPatchwork]

Two helpful hints: Watch with captions and at 0.75x speed.
And pause often to think if needed.

[ThePositiveTarot]

I sometimes watch the videos twice... The first time I just listen and get what I can get, which usually is a broad idea of what the topic is about, then watch it again the second time while concentrating, pausing, contemplating and taking screenshots as necessary

[kiasmorningstar]

I personally struggle with holding thoughts more than 15 to 20 seconds at a time. The quick pace of this series is just right to hold my attention, and I feel the amount of information is just right. I have sat through these traditional courses, and after waiting for people who don't understand to ask all their questions I am already thinking of something else other than the subject matter. Thank you crash course.

[sofiatovedal]

Why do everyone complain about the speed of her speech? All crash-course videos are like this, it's the whole point to squeeze a bunch of information into a short video.

[brittniep]

If you struggle with following along at her natural speed (to make an information packed short video), I recommend choosing the 75% speed option. It is still relatively quick but much easier to follow along with for those of us that aren't as fast of auditory learners! :)

[Chris-vxqp]

I learned and easily consumed more knowledge from this 10 minute video than I did in a week's worth of intense focus towards this exact subject in science class.

[sarahzhao]

She was wrong that the image is always upside down for converging/convex lenses. If the object is closer than the focal point, you will end up with a vitual image that is upright.

[avinashbinand]

I'm so glad this channel exists. It's the only thing apart from my dad keeping me from failing physics.

[conormahon]

Thank you for giving the ant an umbrella

[ycubdjt]

This video has taught me more than the hours worth of lectures I attended for this part of Physics lol, channel never fails

[millie]

When you got a science test next and didn’t understand anything in class

[flamedragon]

I agree. I love the Rogue One and the Last Jedi Prophecy references. Keep up the wonderful work. Yes, I wish they had Crash Course Math also. I could use the math help.

[Emily-onjq]

You know you've watched too much CrashCourse when you recognize that the animation is Scout Finch.

[bridger]

This video alone got me through grade 10 optics! Thank you so much crash course!

[edwardbackman]

Why do I even watch these I can only follow them for the first 3 minutes

[Zikiss]

0:21 Love the Mirror Master appearance.

[Dribbles]

Love it!!! We cover this in Physics 223 but in great detail. Great review!! THANKS!! Keep them coming please!

[dianaanonymous]

THANK YOU THIS HAS HELPED ME IMMENSELY

[yeknomican]

The whole point of "Crash Course" is that it is presented in a "crash" of information. The whole reason why it works is as a supplement to proper lectures, or with liberal use of either the pause button, or the replay button. This has been true since the beginning of this channel. - verdatum