@@neonboy1998 In the religion of Islam, everyone lives in love and love of good. Nobody lives in fear. For us all human beings are brothers to us (we are all sons of Adam). I hope that racism will stop in this world and think about our minds that God has given us to use.
@@neonboy1998 I marvel at this limited mind! I know that the media distorts the image of Islam and calls it terrorism (terrorism has no religion). How many innocent Muslims killed his victim. In the Qur'an in the sense of the verse (which killed a man as if he killed all people), as the hadith says, do not cut down a tree and not destroy the house of worship. You do not know Islam, many like you were one of the strongest enemies of Islam, but when they searched for and learned it became Muslims. Because Islam addresses the mind. and the verses of the Qur'an contain a miracle later discovered by scholars. I think if you look at the Crusades and the massacres of the Jews and count the numbers, you will find that terrorism has no religion .
@@neonboy1998 you're so pathetic. your shit is getting old. go read something. educate yourself about religion and beliefs and actual terrorsim rather than attacking random comments on a chemistry video. says a lot about you. ignorant racist nuisance
On my test I had a convergent lens followed by a concave mirror. Initially, the "image-lens" distance on the convergent lens gave me a positive value, meaning it was formed between the convergent lens and the concave mirror. Now, when calculating "di" for the concave mirror, did I have to give the original "image-lens" value from the convergent lens a negative sign because it was a "virtual object/Image" for the concave mirror?
Because for the second image, the 'object' is the calculated first image he obtained which was inverted. Since the m value is positive its orientation will remain the same which is inverted but if the value is negative then it would become upright (inversion of the inverted image).
@@ARCSTREAMS Snell's law is a very basic law for refraction. We can't find values of certain variables, such as the image distance and object distance. We have to use the Thin Lens Formula. Thin Lens Formula is also nothing but approximation. Sad thing about Ray Optics is that there is a lot of approximation involved. Using basic ideas such as Snell's law doesn't turn out to be very effective. I hope my comment cleared whatever problem you had.
Two thin lenses are in contact so that their axes coincide. The focal length of the two lenses are 15 and 25 respectively. An object is viewed through the combination and the final image produced is 2cm high, erect and 20cm behind the lenses. What is the position ,size and nature of the object
Can you please solve this question “ A converging lens produces a real image that is three times the size of an object. Calculate the distance of the image from the lens.”
m = hi/ho -3= hi/ho -3 x ho = hi Since the magnification for the height and the distance will be equal you can just use the distance instead so -3 = -di/do -3 x do = -di 3 x -do = di
Final Exams and Video Playlists: www.video-tutor.net/
it's so satisfying to correctly make a lens ray diagram. It takes a while to get the hang of it, but in the end it's quite fun!
This video is definitely a good place to start if you have no idea what you're doing
very clear and concise as always, thank you!
Interesting. I didn't know we could use the first image of the object as the object for the second lens. Thanks for the solution!
7 years later still saving lives
This is gold. Thanks so much!
Very clear and most interesting
Amazing Explanations
Can you please upload wave optics
Very well explained.Thank you very much💖
This channel change my life .. 😍
Thanks 💜💕
Your religon changed our lives forever. Now we have to live in fear. Long live allah
@@neonboy1998
In the religion of Islam, everyone lives in love and love of good. Nobody lives in fear. For us all human beings are brothers to us (we are all sons of Adam).
I hope that racism will stop in this world and think about our minds that God has given us to use.
@@neonboy1998
I marvel at this limited mind! I know that the media distorts the image of Islam and calls it terrorism (terrorism has no religion). How many innocent Muslims killed his victim. In the Qur'an in the sense of the verse (which killed a man as if he killed all people), as the hadith says, do not cut down a tree and not destroy the house of worship.
You do not know Islam, many like you were one of the strongest enemies of Islam, but when they searched for and learned it became Muslims. Because Islam addresses the mind. and the verses of the Qur'an contain a miracle later discovered by scholars. I think if you look at the Crusades and the massacres of the Jews and count the numbers, you will find that terrorism has no religion .
@Sumedh Kudale
Watch this
ua-cam.com/video/NjAb3iAFejw/v-deo.html
@@neonboy1998 you're so pathetic. your shit is getting old. go read something. educate yourself about religion and beliefs and actual terrorsim rather than attacking random comments on a chemistry video. says a lot about you. ignorant racist nuisance
Dude you’re a hero
This is so good
Thanks a lot! You are my hero
Right now i am a pilot because of you
If a lens produced a 5cm tall image of an 8 cm high object when placed 10cm from the lens what is the apparent image distance ?
Construct ray diagram?
On my test I had a convergent lens followed by a concave mirror. Initially, the "image-lens" distance on the convergent lens gave me a positive value, meaning it was formed between the convergent lens and the concave mirror. Now, when calculating "di" for the concave mirror, did I have to give the original "image-lens" value from the convergent lens a negative sign because it was a "virtual object/Image" for the concave mirror?
you are great , sir
you help me so much
Can you ever have a situation where the object is closer than the focal length of the first convex lens ???
yep can have
just for clarification,,, the formula for mirrors and lens are the same? f is negative for convex mirrors and lens?
no
1/f=1/do +1/di is lens formula
1/f= 1/do -1/di is mirror formula
where do means distance of the object and di means distance of the image
f is positive for conve lens and f is negative for concave lens
thank you for answering,, the owner of this videos dont really reply on questions tlke this, i appriciate your response,, god bless you
David Noel Villalon thanks
Why would the Di for the second image be inverted when the m value is positive. It should be upright???
Because for the second image, the 'object' is the calculated first image he obtained which was inverted. Since the m value is positive its orientation will remain the same which is inverted but if the value is negative then it would become upright (inversion of the inverted image).
You totally had this video in 1080p but uploaded in 360p
watching this almost six years later
Thank you so much.
Why positive 12 for Do incase of second lens? Since it is on left side?
thank you very much
What about the total magnification?
you are a god.
Am only behind where u said 4 is negative please elaborate more on that
Why is the diverging lens focal length negative?
I was confused abt that too
Can you please upload about diffraction
if di of the first lens is positive shouldn't the do be negative?
Question why M is negative?
When dealing with Real Images, we use the notation that the magnification is negative.
Do u have a video on inclined mirrors?
Yes
i thought that if the lens is concave, then the focal length is positive and if the lens is convex, the focal length is negative?
That's for a concave/convex mirror - not lens.
You are good
How can we draw ray diagram when an object is placed on the right side of the concave lens?
Concave lens always forms virtual, erect and diminished image of an object
Can you please upload telescope loop and microscope without accomodation and with maximum accomodation :-)))))))))))))
does snells law still apply in principal to lenses and optics but the equation changes?
it is the same for those which are undergoing refraction.
@@amitagarwalla8205 so i can still use n1sintheta1=n2sintheta2 for lenses?
@@ARCSTREAMS Snell's law is a very basic law for refraction. We can't find values of certain variables, such as the image distance and object distance. We have to use the Thin Lens Formula. Thin Lens Formula is also nothing but approximation.
Sad thing about Ray Optics is that there is a lot of approximation involved. Using basic ideas such as Snell's law doesn't turn out to be very effective.
I hope my comment cleared whatever problem you had.
@@cubingtubing8172 it was no problem juts curious at the time, thx
@@ARCSTREAMS Ah no problem.
11:00 i was so scared for a sec
SO if I have a magnification of -8 is the image enlarged smaller?
It's enlarged but inverted
K. So, I have consider the magnitude only?
@@tarathetop What do u mean exactly?
I mean that I have to consider |-8| to consider if the image is enlarged or is smaller right?(Ignoring the direction at the moment)
@@tarathetop Oh yeah I get what you mean. Yes you only consider the magnitude
By the way...the correct formula for lens is 1/f= 1/distance of image from lens - 1/distance of object from lens.....
Please I have a question for you
Two thin lenses are in contact so that their axes coincide. The focal length of the two lenses are 15 and 25 respectively. An object is viewed through the combination and the final image produced is 2cm high, erect and 20cm behind the lenses. What is the position ,size and nature of the object
5:45 wrong
7:18 DIO?!
Plz Meaning soluga sir
Can you please solve this question “ A converging lens produces a real image that is three times the size of an object. Calculate the distance of the image from the lens.”
were you not given the f or some other way to find it (D perhaps)?
You can use the formula for the magnification for this, since it's a real image the magnification will be negative.
m = hi/ho
-3= hi/ho
-3 x ho = hi
Since the magnification for the height and the distance will be equal you can just use the distance instead
so
-3 = -di/do
-3 x do = -di
3 x -do = di
thanks daddyyy
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