GCSE Physics - How to Draw Ray Diagrams #70

This video covers:
- How to draw ray diagrams for convex and concave lenses
- How to comment on whether an image is real or virtual, upright or inverted, and bigger or smaller than the object.
Exam board specific info:
AQA - Separate/triple science only
IGCSE Edexcel - Not on your course!
Edexcel - Separate/triple science only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science only
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video

[@zeemish]

To anyone who sees this: MAKE SURE TO PUT ARROWS ON YOUR LIGHT RAYS (or you will lose marks!)

[@Maniiscool92]

Thanks brother

[@hudagal6471]

From now on,physics is easy
After watching this vid....
This was my scariest physics topic
I don’t know how to thank you!
May God bless you for me❤️

[@alfares_]

I was about to memorize 6 diagrams, you saved me hours! Thank you so much.

[@laibakhalid1784]

ughhh god i relate

[@bokke-uh6ut]

I AM NOT JOKING WHEN I SAY YOU HAVE DEFINITELY SAVED ME ON ALL QUESTIONS RELATED TO THIS TOPIC ON TESTS! my physics teacher dose not know how to teach properly and i wish you could show him how to teach!!!!! love this channel 🎉🎉

[@mishaalsaif8990]

Srsly

[@Cognitoedu]

If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_4.12. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom

[@sanjith.k1983]

The Explanation was so simple. I understood so much from this vid. Thanks !

[@KillerTacos54]

This is unbelievably helpful, thank you!

[@aryavjaiswal4033]

Thank you so much for making such a simple and understandable video! Before I didn't know how you can find the nature of the image by drawing ray diagrams, and also how to draw the ray diagrams, but now I do!

[@senarmstrongfanaccount]

TYYYYYY i had no clue how they worked before and this makes so much sense now!!!!!

[@waitaminute7554]

I was planning on just memorizing most of what was in my book...you honestly saved me so much time, and I understood the concepts! Thank you!

[@Cognitoedu]

Glad it helped!

[@ranjithmnair1976]

really liked the explanation!! Appreciate it

[@fatimasohail1185]

This was explained so clearly, gradually, and without going off the topic!! Perfect video for all those who are struggling with ray diagrams 👍🏻👍🏻💫

[@nour.a7765]

Thank you, your videos really thought me better than my teacher! Thank you

[@allchrr0o]

Tysm 😭😭all of your vids literally saved my life

[@Arctic117]

Finally, at least somebody explains the reasons for the images properties. Guess I'm ready for my tomorrows test :)

[@Cognitoedu]

Best of luck!

[@kherrypie4586]

this makes so much sense now! thank you

[@euniee3019]

My exams in a few hours, im so scared but hopefully I’ll do good! Thank you for this video!!

[@user-dn3mg8pm4z]

did a great job explaining much appreciated

[@diajk.1769]

i love these videos. bless his heart.

[@Ahmed_Pirzada]

I have a final in an hour and bearing god as my witness this video saved me

[@nickyskitchenandart8818]

thanks a lot! this really means because i was struggling a lot with this topic!

[@nayansai5900]

you explained better than my teacher who took one week to teach this topic know im subscribed to this channel.

[@moseslee6821]

Thank you so much for this, video after video on youtube and finally someone explains it in a simple way...

[@MahsLife]

This video is a literal lifesaver

[@tejanot8097]

Thanks so helpful man!

[@marysongclub]

Thank you so much! So clear, simple, and perfect

[@Cognitoedu]

You're welcome!

[@samitasajeevan2659]

Simple and Elegant Video❤️

[@mohammadsayafiq6776]

Thank you bro, i watched your vid before an exam leading to me acing it. Currently im teaching my teachers and friends

[@Cognitoedu]

Well done on your exam Mohammad 👍

[@GOKU-bj6nj]

This helped me a lot thanks

[@paarths.5281]

Tysmm, this helped a lot

[@oChicken69]

I have a test tomorrow about this and didnt quite understand. Thanks so mcuh for this Video

[@syedaurazee]

completely saving my gcse

[@advikbhat]

Underrated Channel

[@WISE_WOLF578]

You are one amazing teacher thank you 😊

[@aayanbaig4775]

The best explanation of a topic on any video. Helped me tons!

[@layeredpython914]

Thank you soo much, you may have just saved my GCSEs.

[@Cognitoedu]

Ah thanks LayeredPython91!!! 😊

[@rhaianna7692]

Thank you very much for this explanation, it was quite clear!!

[@aarav2697]

Good work and well explained ....keep it up 👍👍

[@amandahyatt5584]

Thank you so much!

[@itznotscarlett]

I was so scared for this so thank you

[@user-oj2qh4fn1d]

OML such an informative vid! 100/10

[@tanneicabenjamin5447]

Amazing, concise, and well-explained video. Thanks for sharing and keep up the good work!

[@Cognitoedu]

Glad it was helpful! 😊

[@emman_1011]

this rlly helped me thx

[@TheOneTrueMessage789]

Thanks for the video! I found it very helpful one day b4 exam! But for Convex Diagrams, what happens if arrow/object is placed ON F, because u only gave before 2F, on 2F, in between 2F and F, and after F, but not on F. Will it be same size if its on F?

[@salialalisa9388]

So much confusion cleared up in so little time... You sir, are a genius!

[@davenzo3801]

Thanks so much you just eased this whole topic for me

[@Cognitoedu]

That's great to hear, thanks Davenzo 👍

[@ikeyy344]

THANK YOU SO MUCH THIS HELPED!

[@wolfgang6889]

Hey........ stay .....😁

[@motivation10867]

That's excellent !!

[@highpingguy3979]

what if the object in concave lens is between 2F and F? Will it change the form of image?

[@qaifu]

Thank you so much 👍🏻

[@lakshmidharanseetha1294]

Super bro I don't have words to appreciate you

[@ivashehu7097]

Congrats on all the subs! Well deserved 👏

[@omarsafwan689]

They re so underrated right! My physics teacher would let taken a month to explain his lmao

[@omarsafwan689]

Would have*

[@Cognitoedu]

Thanks Iva, we really appreciate it 😊

[@Ghost-oh1vc]

Have my future children, taught this better than any teacher that has tried to teach me this concept.

[@minkhant1683]

Thanks alot sir!!!

[@henrypaddison8801]

thanks for the help

[@amitjohn]

Great thorough explanation, really helped.

[@straw9992]

Thank you❤

[@bepotrang5101]

thank you so much omgg 😭😭😭😭😭😭

[@meeraalali1562]

if this wasn't enough he also has vids for math bio chemistry man I will graduate with A+ in everything in school

[@Cognitoedu]

🙌 🙌

[@Jannat_00137]

thank you

[@jackieantonia]

Thanks for saving my life 😩😩

[@ssendagirezai]

Thanks alot

[@master4755]

you are actually amazing , no other words man - keep it up!!

[@Cognitoedu]

Thanks! Really glad to hear you found it useful!

[@ahmadhuniana4634]

Sir you video help me alot i can not thank you much

[@lilliankabotolo689]

Brilliant

[@brawlstarsgamingv2312]

Thank you so much for doing this! I struggled so much with this topic, but here something just clicked, and I understood it!

[@mayahartup8906]

Hey thank you so much this was really useful! Just wanted to know what you recommended doing when you aren't given a focal point/principle focus and asked to either draw the diagram without, or put the focal point in yourself? (The question I was given didn't have any rays drawn either)

[@s.m.386]

In that case make sure the two focal points are equally distanced, as long as you do that, the distance in amount doesn't matter, and everything else you can just do as shown in the video. Hope this helps~

[@williamnield7133]

that video was so easy to follow incredible work!

[@Cognitoedu]

Glad you liked it!

[@amy8512]

@cognito will the concave lens image always be virtual as you are always using a virtual ray?

[@oozyjoey8869]

Yes

[@brykmcginns]

This saved my bacon for my SO event

[@amniizzati3592]

is it no video for mirror ray diagram?

[@ow8661]

Legend

[@jellycake1838]

THHAANNNKKKK YOOUUUU

[@hassanali-yl3st]

is concave same for all

[@pixzlz]

thx

[@chrom1x128]

THANKKKKK UUUUUUUUUUUUU

[@hk4033]

how far should the first focal points be? does it matter?

[@omnipotentbeing5851]

Yeah I'm confused about that too

[@dingus1013]

God bless this channel

[@milokrahen6679]

are concave lenses in the IGCSE syllabus? i don't think so correct?

[@shionboyd7027]

Different to mirror ray diagrams?

[@krishshivsharma2667]

Why did I find this channel one day before my physics finals

[@krishshivsharma2667]

This channel is so helpful, I surely will use this channel for my may/june exams

[@cherylp2516]

Hi!! Thanks for the videos, their really helpful :).

[@elfyiryan3667]

this is absolute POGCHAMP!! you guys are underated!!

[@velveteuphoria7881]

I’m here to remind you that you said this

[@ayleas_4910]

@@velveteuphoria7881 HAHA

[@coffeekid_692]

I'm here to remind you that you said this part2 the sequence

[@fandapanda7792]

Here to remind you you said this part 3

[@somerandomdiamond7345]

Here to remind you that you said this

[@tpr1808]

Nice. Now I can pass

[@muhammadshameer3442]

Bro teaches better than any teacher I have had so far💀

[@absolutelydheeraj]

FR

[@bestcakeideas5424]

Sir Why did u drw a small image in ray Crossing point in concave lens diagram?

[@mariamusab10]

it's because the image created is smaller.

[@mariamusab10]

It is also one of the image properties of the lens.

[@akaribrawlstars4534]

If only I found this video sooner…

[@bibidelafield1946]

is this edexcel?

[@rim2675]

my physics teacher literally taught me none of this 🤷🏻‍♀️

[@opbhawarth]

thank youuu
i was memorizing but now I dont

[@Mypeachylifestyle]

I don’t understand how the rays go in what direction! 😭

[@chelseachukwuemeka604]

I really think a concave lens is a converging lens not a diverging lens

[@Cognitoedu]

Hi, we say that concave lenses are diverging lenses because they cause the light rays to bend away (diverge) from the axis. Convex lenses are converging lenses :)

[@user-lo1gx1gd7w]

Anyone else in their freshman year a week before their exams 😂?

[@BillySawAMan]

Ur in the wrong country

[@rozamahmoud3380]

Nice chicken

[@samuelbrook2078]

ayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

[@multi.instrumentalist]

Better than FreeScienceLessons

[@user-dn3mg8pm4z]

bit of a stretch mate but still gd tho

[@Noor-ib5hf]

i agree. freesciencelessons didnt go into this much detail; he just worries too much about keeping the videos short.

[@tamilggamingkavi5614]

Who are 2021

[@Mohammad.H17]

WTF

[@homecraftin5minutes718]

CONCAVE MIRROR IS CONVERGING MIRROR NOT DIVERGING MIRROR

[@youssefswedan]

no convex is converging

[@youssefswedan]

loud and wrong loud and wrong