Optical Instruments

The eyeball, near-sighted and far-sighted. The camera. RGB Color mixing. StrobeFX. Ray tracing. Magnifying glass. Microscope. Telescope.

[@ricksanchez7965]

It's 7th of September 2019 the time is 6_7 pm watching this lecture 1 week before the mdcat I can still recall that time this video helped me score 100% in the concerned questions today it's June 2021 and I'm in second year of my dental school thank you!

[@Smarczek007]

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[@michaelmarzano2759]

Prof.Anderson, you are so accomodating with homework and chapter review deadlines. I always had mine done ahead of time, but offering flexibility is a very generous gesture.The beauty of your explanations is your ability to break down the topic discussed in a way that enables all levels of skill set and knowledge to appreciate the concepts, through visual and auditory gestures, and you make it fun along the way.You keep it real.I wish you were my physics prof. Thank You sir 👍

[@yoprofmatt]

Wow, thanks much, I really appreciate it. And yes, you may now have a homework extension. Cheers, Dr. A

[@abrahamlopez7499]

Im amazed the way the professor writes backwards, its awesome! Great lecture!

[@yoprofmatt]

Thanks. Not writing backwards, though. kzbin.info/www/bejne/eYirfqeJg7Crj6M Cheers, Dr. A

[@outcast4973]

Thank you Professor, I've learned a lot from you.

[@ahmedhizenberg]

thank you so much Prof. Matt , concise and helpful lecture with clear practical examples. ii learned a lot of things from it. many thanks

[@yoprofmatt]

Ahmed, You are very welcome. Glad you're staying focused. Get it, focused. Ah, optics humor, can't get enough of it. Cheers, Dr. A

[@nhickscarlos]

awesome! this is so cool! thanks!

[@amramjose]

Great lecture, very clear and didactic. Thanks!

[@yoprofmatt]

Great to hear. Cheers, Dr. A

[@doyoulikedags3534]

You sir, are a lifesaver.

[@yoprofmatt]

Excellent. I assume you're not talking about the candy? Cheers, Dr. A

[@perihangummadova5017]

even tho its an 8 year ol video, it looks very modern

[@benjaminmathew2]

Thank you. But to clarify, in the relaxed state, a farsighted eye will not see clear at distance or near. Whereas the far point of the myopic eye is somewhere in front of the cornea. Ophthalmologically we say that the far point of the hypermetropic eye is "beyond infinity". Though that may not make sense from a physics perspective, practically that means that without some refractive correction (accomodation, glasses, etc) the farsighted eye does not even see clear at distance, much less at near.

[@yoprofmatt]

Yes, good clarification. I suspect you are an ophthalmologist? Cheers, Dr. A

[@benjaminmathew2]

Yes for these reasons (the farsighted eye can not even see far in the relaxed state but practically can sometimes see both near and far with accommodation), I avoid the overly simplified "farsightedness means being able to see far" concept when talking to people. btw drawing on the clear board makes for very nice visuals. I am amazed how well you can draw and write backwards!

[@bora3035]

Amazing.

[@DadiKefiyalew]

Wow I like it your expression methods God bless you

[@ctoro3085]

Woow i was studying why Snell's law explained the use of oil on the x100 lens of a microscope. And now i get it!!! Thank you so much

[@yoprofmatt]

Very cool connection. Cheers, Dr. A

[@jompasv1]

You could start a virtual fire with your near-sighted friends glasses though!

[@EvaTruve]

Nice idea

[@salahramadan3253]

great lecturer and absolytely genius

[@yoprofmatt]

Thank you for the comment. And hello to Egypt from San Diego! Cheers, Dr. A

[@josephxavier681]

you are absolutely an awesome lecturer 👌👏👏

[@yoprofmatt]

Thanks Joseph, It's all about the lighting. Cheers, Dr. A

[@michaelmarzano2759]

Absolutely

[@mementomori5271]

I love your lectures

[@yoprofmatt]

Thank you, I appreciate it. Having fun myself. Cheers, Dr. A

[@anishbonda1489]

which text book does sir use ?

[@adnanphysist2822]

I have no words hats off ❤️❤️🇵🇰

[@siddymendy8742]

please professor where can someone download all these videos in a single folder it would be ideal to get all your lecture in single folder

[@yoprofmatt]

siddy, Thanks for the comment, and keep up with the physics! You might like my new website: www.universityphysics.education Cheers, Dr. A

[@rikusdutoit]

I don't understand completely... at 10:00 if you are far sighted you can focus on objects far away so rays coming in parallel should focus on the retina right..?

[@drewbhardwaj]

The Real Professor

[@yoprofmatt]

I was hoping for the Imaginary Professor, but okay. Cheers, Dr. A

[@paulhodges101]

If only I had the brains

[@malikrr3703]

thank you very much were can find course about non-thin lenes ??

[@yoprofmatt]

I don't have that one up yet. To do it properly, you need something called ABCD matrix formalism for that. Cheers, Dr. A

[@johnmartin6178]

Very interesting lecturer, but I'm puzzled as to how does that screen works?

[@PinchePuercaVato]

The image is mirrored in post production to flip everything horizontally. Notice he looks like he writes left-handed? I'm willing to bet hes right-handed and you just reverse the image. The camera captures everything written backwards, after the flip it's all back to normal.

[@johnmartin6178]

@@PinchePuercaVato He did an explanation of the display. It was all pretty straight forward and understandable once you see it.

[@Mrsh-18]

Nice explanation.

[@nambusiannet4060]

Hi

[@dustysane1591]

Wow

[@kailashsingh9737]

Very nice good morning hi ji Sir

[@evanrutherfordlazyahole9079]

I'll do homework when I'm ready.

[@nathanielsahrborbor3886]

Please sir I want to study physics how can I contact your institution? I'm presently teaching physics in a high School because I studied electrical and electronics engineering at ND and HND level. I couldn't complete my degree course in electrical and electronics engineering because of financial constraints.

[@eddieelkins421]

You have a gift for writing backwards.

[@yoprofmatt]

I wish. Answer revealed here: kzbin.info/www/bejne/eYirfqeJg7Crj6M Cheers, Dr. A

[@darkvader2024]

Last minute study 😭. But great content

[@arqumabdulah2796]

“Aqueous” humor 😲 get it now

[@jimmimak]

Are you mirror writing and left handed, or is the video flipped?

[@jimmimak]

OK, I found the answer, the video is flipped using a mirror or software. kzbin.info/www/bejne/eYirfqeJg7Crj6M

[@JKxJewels]

Hi Hilda!

[@venkatbadhrinarayanan2282]

❤❤

[@Sci_Phy-DRSir]

Isn't that first figure for far sightedness wrong?

[@stimulantdaimamld2099]

great

[@yoprofmatt]

Thanks, glad you're finding them helpful. Cheers, Dr. A

[@stephanbilmans]

when will the USA change to SI units which are international???

[@yoprofmatt]

Totally. Been way too long. I remember people talking about this when I was a kid. Cheers, Dr. A

[@jjayne3388]

Why does the light never look white to me?. I see binking colors even when still. purple pink blue yellow

[@ahrentrevino9981]

Just like our eyes, the camera has a certain refresh rate. It may capture the individual flashes better than what a human could in person. That's just my educated guess.

[@siddharthdyavanapalli4617]

optics is easy sir just all about spontaneity in the topic and pretty interesting do not call it tough!!!

[@yoprofmatt]

Fair enough. Although optics has a habit of getting VERY tough when you probe deeper. Cheers, Dr. A

[@siddharthdyavanapalli4617]

true

[@nephilimdeath9940]

Thank u so much sir .

[@yoprofmatt]

You're welcome. Thanks for watching. Cheers, Dr. A

[@nephilimdeath9940]

Matt Anderson hello sir I'm from india and when I had health issues during my college time I skipped classes and watched ur videos thank u for ur help

[@yoprofmatt]

Glad to hear they were helpful. Hope you're feeling better. Cheers, Dr. A

[@spurti]

Ohh at 1:09:18 clip tan(theta)≈ theta because of taylor series which is a type of power series.

[@yoprofmatt]

Very good. Cheers, Dr. A

[@sushantsingh8700]

Why always homework 😭

[@paulhodges101]

😉

[@moe531]

Great lecturer

[@yoprofmatt]

Thank you for the comment. Keep up with the physics. Cheers, Dr. A

[@paulhodges101]

Eat well people. Enjoy making your own meal's. Do not! Lick windows. Lick something nice 😉

[@benjaminmathew2]

Nice lecture, but your comment at 5 minutes regarding determining farsightness by not being able to see things when held close (without glasses) is not entirely correct. In practice, you need to also take into account their ability to accomodate (which typically, though not always, represents the age of the patient). A younger hypermetropic person with sufficient accomodative amplitude will see fine at distance and near. It is only when hypermetropic people are older and unable to accomodate (or have to overcome a large baseline refractive error) that the farsighted patient will not be able to read up close.

[@yoprofmatt]

Benjamin, Excellent point, thank you. In this example I was referring to the relaxed eye, thus looking at the behavior of the focusing lenses (primarily the cornea) without accommodation by the crystalline lens. But you are absolutely correct that a (typically young) person will have the ability to change the focus of their crystalline lens enough to see clearly both near and far. Thanks for commenting. Cheers, Dr. A (Laughing because I'm wearing my "old-man" progressive glasses as I type this.)

[@paulhodges101]

😛

[@bunnykiller]

that class seems to be lacking enthusiasm... I would have my hand up 3/4s of the class.... so many questions to get answered.

[@yoprofmatt]

bunny Killer, Time for coffee! Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A