yep can have

Concave lens always forms virtual, erect and diminished image of an object

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 kzfaq.info/get/bejne/hNBxlZaapqzJmqs.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

Yes

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).

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

That's for a concave/convex mirror - not lens.

When dealing with Real Images, we use the notation that the magnification is negative.

I was confused abt that too

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.

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

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

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