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GCSE Physics Revision "Required practical 9: Reflection and Refraction" (Triple)
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- čas přidán 17. 01. 2018
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In this video, I take you through the key steps of the required practical on reflection and refraction.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
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Apparently one thing they also like asking in the exams when it comes to Practicals is “Why this May be inaccurate? “It’s basically because the width of the light ray may make it difficult to locate where the centre is ! Good luck to everyone doing exams tomorrow( or whenever )! 😉
@Is_That_a_Supraaa! same 🤣
Could you expain why it is difficult to locate the centre
thank youuuuuu!!!
@@AliAli-li1yo Because the ray will be wider. Its easier to measure a thinner ray with a protractor than a wide, more spread out ray.
@@AliAli-li1yo because it depends on the angle you look at it or the opinion of whoever is reading it, so the centre may be different to other people and therefore be inaccurate
Every May of each year this channel will blow
lmao so true
Yeppp
Every year...
Oh yes. Got my physics exam in 5 days eeeeek
It's May right now and that's so true
your videos are proof that we don't need to spend our money on private lessons... thank you!!
Thas kinda mad still, noice.
@@obk646not mad at all lil bro
You really are the best! Carrying my GCSES... Seriously I couldnt have done it without you man. I always find physics hard but you simplify it so well!! I cant thank you enough
No problem and thanks for the comment. Best wishes for Thursday.
@@Freesciencelessons 4 years later and you are still replying quickly. Legend.
good luck for Thursday
@@Freesciencelessons will you be at leavers!??
What did you get bro
This man is the only reason I have survived GCSEs
Instead of teaching us during quarantine our physics teacher sends us this guys videos and I’m not complaining
Im lucky I stumbled across him in my yr 10 quarantine Terror
Fr the teachers are getting lazyy
Same haha it works better than him explaining on zoom though
Dr Donnely, thank you so much for everything! I literally only revise by watching your videos and I always get 7s 8s and 9s in every exam I've done, honestly, you're the best. One more exam to go tomorrow, it will be weird not watching your videos for a while but I'll hopefully be coming back for your A level videos. I've always wondered, what Science subject do you prefer?? and thank you so much!!!
Thanks for the comment. I'm glad to have been able to help. To answer your question, Biology is my favourite (as it's very interesting, especially at A level) but Chemistry is my favourite to teach (as students can understand so much of it if they just get a few basic ideas). Best wishes for tomorrow.
hey
Thank you so much, you have helped greatly in the past 3 years!
No problem and thanks for the comment. I appreciate it. Best wishes for tomorrow's exam.
Thank you so much for your help these past two years for my GCSE, you have saved my grade! Hopefully it will pay off tomorrow :)
Thanks for the comment and best wishes for tomorrow.
@@Freesciencelessons damn u still reply to these comments
what did you get?
I never really knew what I was doing it’s these practicals but thanks to you I know what I’m doing now xxx
Thanks sir! Wish me luck on tomorrow’s exam 😁
Best of luck tomorrow. I hope that you get the grades that you want.
Thank you :)
this is now part of the combined science course btw
When you have a Paper 2 mock next week and you realise you don't know anything ....
Thanks so much FreeScienceLessonsGuy
Anyway Goodluck to all my #GCSE2020 people
Do u GCSEs now then
How’d that go then🤣
that aged well
Heh how’d that go for you?
@@shahd888 Im presuming it went well as this person revised for the mocks and the people that revised for the mocks and got a good grade almost guaranteed themselves in getting a good grade last year.
sir you are the GOAT!! you explain things so well, i learn more in five minutes than i learn in a month with my teachers. thank you for this...
Physics Triple Science tomorrow, I appreciate every single thing i've looked at on your channel and without them i don't think i would be as successful tomorrow. Good luck anyone out there who's revising, you'll do great. I seriously can't think you enough, Dr Donnely
I don't normally comment but Dr Donnely really does an incredible job on these videos. The level of detail is amazing. Especially with the physics required practicals.
he really is amazing! if it wasnt for him, id be completely failing my gcses right now
It has been a wonderful journey to partake in sir Donnely, you truly should sleep well knowing how many students you helped. I am a high achieving grade student, but credit is due where credit is due and it cannot be understated your impact. I would be honoured for a reply, to know one of the Greatest Of All Time's for science education has seen my comment haha
Thanks for the comment, I appreciate it. Best wishes for today's exam.
You are great sir and I appreciate that you spend so much time making these videos .
Sending divine gratitude to this lovely man, you are our saviour!
There’s no way.. I have an exam on this subject in the morning.. you life saver 🙏🏼
thank you so much sir! i went from a 3 in year ten to a 9 in my last mock thanks to you and my teacher i’ll always be so grateful for these videos :)
Good evening sir! I just wanted to leave a quick comment to thank you for consistently putting out amazing revision videos on CZcams! You’ve been a huge help to me and my peers over the past 2 years, and you’ve made the revision experience both a straightforward and enjoyable one! You have a real talent for creating simple-to-understand content for all students to learn from. Truly, thank you! :D
Just wanted to come on here and thank you for all of the effort which you have put into these videos. I and many other GCSE students thank you from the bottom of all our hearts.
Hi sir! i haven’t commented before but i’m close to finishing your playlist tonight before my last gcse tomorrow :-) i really wanted to say thankyou because i only recently found your channel but before all my science gcses ive been watching the playlists you’ve made and there’s something about your videos that just stick in my brain so i can recall it in the exam and i’m really grateful! i hope to do biology next year so i will come back to watch your a level biology playlist and i can take my time watching them. Thanks again i hope you know how helpful your channel is 😁👍
For AQA TRIPLE HIGHER, not combined, this is AQA’s official statement:
“The final question on our GCSE Physics (8463) Higher Tier Paper 1 on Thursday 9 June 2022 was about energy transfers and circuits.
Energy transfers were listed in the advance information as being assessed - but circuits were unfortunately listed as not being assessed.
To make sure students aren’t disadvantaged, we’ll be awarding everyone full marks for all parts of the question, which were worth a total of 9 marks.
We’re really sorry this has happened, and we’re looking at why our checks didn’t pick this up. We’re also doing continued extra checks on the advance information and question papers for future exams.”
GCSE 2022 ???
You have done me so much for my exams for the past years!
I may or may not return to your videos, but I just wanna place my thanks to you because I managed to understand everything!
i have my final exam tomorrow and i want to say thank you, before watching your videos in year 10, i got a 3 in my end of year exam, now i’m in year 11 and got 9s for both of my physics prelims because of your videos
so we all here memorising this video for 2022 gcses?
AHAHAHAHHAHA me fr rn
2024 for me
you have no idea how much you have saved my grades and removed so much stress from revising. ur a legend and a lifesaver thankyou so much!! exam tmw good luck everyone :)
honestly mate youre a godsend. im on my last gcse exam and these videos make it so much more of a bearable experience. thankyou so much for the free knowledge.
thank you so much for your videos, I realised this may be the last time I watch your channel and I just wanted to thank you for helping me so much with my science grades, you honestly motivated me to do well in my science exams so thank you :))
Thanks for teaching the required practicals in such a concise, easy to understand manner, its made all of my sciences so far much easier, hopefully tomorrow will be the same!
Thank you so much for helping get me through the exam period. Me and my friends all use your videos and they've always been a great help! Just tomorrow left now
Thanks for all the videos they've been life-savers over past few years, arguably the best teacher out there
Thank you so so much! Our final exam and final science exam is tomorrow and you have been a life saver, I have had the spec with me the whole time whilst revising your videos and you manage to include every point we need to know but condense it so we don't waffle or spend too much time on the topic. Honestly, thank you :)
Thank you sooo much. You honestly helped me get through my GCSEs. I’ve watched all of the required practices literally hours before the exam and u explain it so well
This was my last GCSE video.🙁 Thank you, these have really helped over the last year.🙂
Thank you so much for your help over the past 4 years ☺️✨
Thank you so much sir :) I’ve been watching you since Year 9 (especially in lockdown) and I can’t believe it’s my final GCSE tomorrow. Thank you so much for helping me understand science so much easier within just a few minutes!
Thank you for your explanations of the required practicals of all 3 sciences, it’s helped me a lot this year.
thanks so much, could not have done it without you my friend
Thank you for saving all my exams for the past few years, physics and chemistry are my worst subjects but you make them understandable
taught me more than the 6 months of online lessons
Almost at 600k, congrats 👏
you have helped me so much through my gcses. thank you! i’ll definitely come back to your channel for alevel!
I have my exam tomorrow thank you!
thank you!!! last science exam tomorrow ever, and they've all gone well thanks to you!!!
Thank you for all of the help with our exams, the reason I’m getting such good grades is all down to your videos. Hopefully I’ll continue to watch your videos in A level!!
Yes Don, Night before revision
yes this man make happiness true
On the morning of the exam, thank you for all your help sir!
Thank you so much for this video! This required practical really confused me but you've summed up each point perfectly :)
this man is a national treasure
You are a living hero, cheers brother.
Thank you so much Shaun, u carried my GCSEs.
I just wanted to say thank you so much for all your help during my GCSEs, I seriously couldn’t have done it without you! I’ll be back next year for your A level bio and chem vids😄
Thanks. I'm happy to have been able to help. I hope that you get the GCSE grades that you want.
@@Freesciencelessons 💜💜
hi I have a question. a ray of light enters through a small hole in a tin can. within the can some light is absorbed and reflected. Why does the small hole look black. I really don't understand the answer to the question and the mark scheme onset make sense
because the part where it looks black is not lit by light ans the light will reflect at a different angle so it would not be lit and would appear black
sublime video as always
trully appreciate that you spend so much time making these videos .
Is this in edexcell foundation?
does it matter science is science
no
Last ever Sean Donnelly video I watch thanks for all the knowledge big man ❤️❤️
Thank you so much, last gcse tomorrow and the last few years would’ve been painful if this channel didn’t exist. Definitely gonna be coming back here for a level vids 😅
Does it matter which way round the angle of incidence is? I have seen numerous diagrams online and in my revision guide that it is the other way round than in your video. Thanks.
Thank you so much, you have simplified this practical so much. You are the best!
Thank you so much for explaining everything in a way I actually understand. I feel like I might actually pass physics now 😃
Thanks a lot, you are truly a legend, hopefully I do well tomorrow!
lifesaver you hekped me understand so thank you soooooooooooooooooooooooooooooooooooo much. u are a national treasure
This man is the saviour of all students for science gcse 😂😂👌👌💪
you should make past paper solution videos, that would be very helpful!
appreciate all your help king 👑
THANK YOU SO MUCH!! this was the 6 marker in aqa triple higher and i’m pretty sure i did really well in it thanks to your video :))
You are a life saver, thank you so much
i have this in my foundation test tomorrow
Everyone here will pass thier exam👍👍👍
shoutout to mr donnely for wishing luck for the exams that's so kind honestly :))
Thank you for all the help
thank you so much for everyhting !! will come back again to see ur videos in alevel :)
Morning of the exam, thanks for everything sir!
I love you with all my heart
Good video my man
Thank you for all your videos, you saved my life XD
Thank you, you are a great teacher!
lets hope we all do good in this exam
we have dr donnely on our side
amazing vid I'm not scared for the test anymore
Great Video
thanks for the videos
HI sir,
1. Is there any difference between the transmitted ray and emergent ray? Are they same?
2. are angle of incidence and reflection same for all surfaces in the world? (video ---- 3:01)
thank you so much this video was so helpful for tomorrow
Do we still need to know Sin(I)/Sin(r) to calculate the refractive index?
nope
We need to learn this for Combined Science trilogy.
Solid
you saved me and caryses gcse🥰🥰🥰🥰🥰😍😍😍😍😍😍
Hello sir for AQA triple higher do we need to know about the refraction of waves I don't see it on the spec neither on the playlist.
thanks for the vids g
you are my life savior
At 0.58 Are you supposed to make that perpendicular line at the centre of the horizontal line or does it not matter?
I don't think it would matter where you draw the normal line. However you would have to direct the ray of light along the normal line you have drawn, and so It's just easier to draw the line in the centre. Get me?
11pm, exam tommorow at 5am. Here we go, last exam!!!
Hi does that mean for every materials on earth the angle of reflection and incidence will be same? 2:59
No, as they all have different surfaces e.g. rough or smooth etc
thanks sir 😊😊