im so high i don’t know how i got here but im so excited to tell everyone how amazing the human eye is. thanks

Thanks for the video, it was excellent! I have a good knowledge of maths but nothing in physics, and your video explained it really well. It was a lot easier to follow and easier to stay interested in than the other videos i was looking at.

Well done. I'm a physicist and I must say that it was clearly, and more importantly funny way of explanation.

I believe so, but this program is not used in the USA, so I'm not certain. I follow an AP Physics curriculum, which seems very similar from my research. Feel free to watch what helps you and supplement with A-Level specific lectures when needed. I also want students to work many problems to develop intuition and skills. Just watching videos will not get you a physics education, but it might get you thinking.

Pretty cool! you seem to be a good teacher would be waiting for more of these!!....

I like everything you've said. Keep it up.

Awesome video. Thanks for entertaining while explaining.

Damn such a fun way to teach, well done

I did not like this treatment at first, but after watching other videos, and thinking about it myself, I came back for a second look, and I like it better! I think you can use the small-angle formula without going into the expansion of the sine and cosine. Most people won’t understand Taylor expansions, so they don’t help here :) that bit distracts from the message!

Video is profitable.We need talented facilitators like you.

Thank you, you explain so much better than my uni lecturer, and more interesting than reading 4-5 star rated amazon physics books :) Keep it up

I'm in the USA. Can you share the differences? I'm always curious about how physics is presented around the world.

Doc Schuster What would be better for generating a powerful beam of light onto a general circular area; a single, large lens or more smaller lenses?

Hey! N/f + 1 is a conditional case only when the image is at the near point, I think! Love your videos!

As soon as he mentioned that those older quarters were worth 4 bucks, I started going through all my change looking for old quarters and missed the rest of the video =P

Thanks for the video One quick question,,if the object is at focal point and image is formed at infinity, do we actually see that image? How can parallel rays converge to make image in our eyes? If not then why magnification formula?

Hi Doc Schuster, I am studying to understand what the power of a magnifying glass does. What is the difference between 2X, 3X, 4X? Do you have a video explaining this? Thank you! You have a new subscriber today.

This playlist was really good yo. In god we trust!

Helpful, thank you

yeah of course you are right good use of logic mahn!

Depending on where your eye is, it's not always the maximum maginification when you place the object at focal distance, and the magnification is not always N/f. When you place your eye right next to the lens, the maximum magnification is actually N/f + 1

You are awesome!

Excellent

Regarding ur last qn, is the answer the thinner one? Cos the f will be smaller?

Thicker lense...! Your amazing, and you teach math well! Id like you as my teacher fo sho! Nice job on that silva coin as well !

Wait so which ones better at magnifying?

so you're able to increase your eyes or the cameras and lenses capacity to focus on nearby objects at the same distance by fooling your eye into thinking they're infinitely far away!?

hi DOC , you are so good at physics , so can u make a video for working of compound microscope and simple microscope , along with finding their magnifications, and also on How is malus law is derived or obtained ... i ll be watching for it thanks

The thicker convex lens would show greater magnification as the 'f' would be much smaller when compared to a thinner convex lens

A nice green eye :)

what country is this for? In UK we get taught this topic in school but with different names.

does the thinner lens have a bigger focal length? Radius of curvature would be farther away from the lens surface. The surface seems flatter for the thinner lens with a greater focal length. The thicker lens will magnify the object more. The focal length (radius of curvature will be shorter) making the Magnification larger. ~ since The Focal length is in the denominator

Every thing has a parallel prayer or a song to stop some sort of myth maybe like a subwoofer box use your head to have ideas they can't fool everything or everyone if he's some part of something by mistake by using all kinds of things

Hey Doc, I'm working on a project on magnifying glasses. I'm not a physicist however I would like you to recommend me something to learn about focal point, length & temperature. Thank you!

I am having some difficulty with a project that requires viewing a cell phone and characters from an approx. distance of 4" from the eye. I can easily place a lens with a diopter of 6 directly in front of the eye and read the characters but the project requires the lens/ lenses to be placed close to the face of the cell phone. Would you recommend a combination using converging and diverging lenses or would it be best to go with a single large magnifier?

Interesting stuff

the thicker lense should give you a better magnification right? Since the thinner lens has a greater radius of curvature it will also have a focus that is greater than the focus of the thick lens. Greater focal point yields smaller magnification. am i correct??

How does the eye REALLY works? Some books bring images that shows exactly the same thing you drew. But others show that te lens of the eye focus the light into a single point in retina, without 2 oposite angles. I have no idea of which is the correct answer.

Oh hey, well I'm 16 and in uk you learn this at ages 15 to 16 for GCSE. But it's less detailed and simpler, I think when we go college and if we choose physics for A-levels (I don't know the equivellence qualification to America sorry) is when we'd learn it more in depth. This is basically all we learn about these graphs - /watch?feature=player_embedded&v=gr55WiBp1qg

damn I'm just trying to design a magnifying glass lens using borosilicate class and making it by hand I think I have an idea when I tried to make two lenses connected to a long shaft of glass and I would look through it kind of like a unified telescope there was so much glass between the two lens objects that I would get all the stress marks in the glass magnified drastically and it would blow the capability of the lenses to coordinate and form an image through them.

Your explanation of how the magnifying lens works is clear, but at the beginning you seem to have neglected explaining the role of the lens in the eye. You just show one ray coming from the tip of the object and going through the eye lens, without showing the role of the eye lens in focusing rays coming off from the tip at all different angles, ending up hitting the same point on the retina. It seems to me that you need to explain how the eye lens works to understand this phenomenon, just as much as explaining the external magnifying glass. Your early picture shows nothing about the eye lens refracting the light. After seeing how the magnifying lens, one can go back and fill in the gaps about the limitations of the eye lens causing the necessity for having an external magnifying lens, but that requires a big leap by the student.

Sorry, but when you move the object near your eye the image forms behind the retina (if the person is an emmetrope). Now, in order for the image to form exactly at the retina, the eye accommodates. This is when the ciliary muscle contracts so that the lens becomes more biconvex.

from the father or right and wrong. thiss is fruaaken aaameeizingg.

Some evil doer magnified sound in Albuquerque........

The real question here is why do you have a smiley face drawn on your hand.

great video ;D thx man

The one on the left!

Help me out. Why?

amaze

Is John Mulaney teaching me about the physics of light right now?

i was told to revise how magnification works specifically, I was never even taught this so I had to look it up - this video completely loses me lol

That Quarter is actually 90% Silver and has 5.623 grams of Pure Silver in the Alloy. You knew that tho because you collect Coins. I went to the wal-fart today to purchase low quality mechanic made in not USA and as I was sitting down in the Go-Kart I race around in there,(because that's how I roll), I noticed a Penny on the Floor so I did what anybody should do when they see a Penny on the ground, I scooped it up and Spied it out and it was a 1920 Wheat Cent. I consider that Good Luck LoL Yep Sliver and Brass Ring at Different Resonant Frequencies than other Metals. Good Call Doc Fizz See ya on the next one^!!^

Anyone see the face on his hand

What I wanted to know is why it makes a beam of light and the factors for that beam of light. Your video was just not in my format.

use a white board to save you paper

you so cool.

the left one.

Followed this during green pen, totally lost after that. Sorry.

This is beyond me lol

I would like to know how magnifying glasses work. Your video came up, and I thought, this is going to be good. At 4:40 I'm convinced you are not explaining how magnifying glasses work, rather you are showing off. The other math majors will appreciate your video. I'm off to find a teacher, not a self-amusing showoff. But here, let me pin your video on the refrigerator. *pat, pat, pat *

bruh.........you lost me..bruh

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A whole lot of useless Information LOL

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