@legotransformersonic : This might sound lame, but just pretend the lens is bigger, as in taller than it's shown on your sheet, and use the same method as in the video. In real life, you might not be able to see the entire image at once, but the part you could see would match the drawing.
@cr4zyftw: Converging lenses are thicker in the middle. Some are convex on both sides, like the one in the picture, and some are convex on one side and concave on the other (but always thicker in the middle).
from the diagram: if the image is on the opposite side of the lens from the object, then it is real; if you have to trace the lines backwards so that the image and object are on the same side of the lens, then it is virtual
from real life: if you can get the image to show up on a piece of paper, then it's real
what if the lens is smaller than the image? How would that be drawn?
legotransformersonic 3 months ago
@legotransformersonic : This might sound lame, but just pretend the lens is bigger, as in taller than it's shown on your sheet, and use the same method as in the video. In real life, you might not be able to see the entire image at once, but the part you could see would match the drawing.
pegru001 3 months ago
thank you lots! was still confused about this and my exam is tomorrow :s
Stuu157 3 months ago
HOLY CRAP THIS HELPS. my teacher never told me how to actually draw these so i never really understood the formulas.
rey619yomama 10 months ago
pretty cool!
TheEihcnem 1 year ago
Thanks, Helped heaps :)
k0z69 1 year ago
U are a life saver! i have my exam tomoro and i had no idea how to draw ray diagrams
kakaroxox 1 year ago
is converging lens convex or concave
cr4zyftw 1 year ago
@cr4zyftw: Converging lenses are thicker in the middle. Some are convex on both sides, like the one in the picture, and some are convex on one side and concave on the other (but always thicker in the middle).
pegru001 1 year ago
Where can i download this exercize papers?
lutzweb 1 year ago
@lutzweb
look for a raytracing document at
ww dot tc dot umn dot edu slash ~grul0005 slash washburn
pegru001 1 year ago
Thankyou very much - you should be my Physics teacher :-p.
(You have very neat handwriting, and sketch like an artist)
abrahamgabriel 1 year ago
This has been flagged as spam show
this is how it works...
1.hold your breath
2.copy and paste to 1 video
if you can do that without taking one brethe CONGRATS IT MEANS YOUR A GREAT KISSER
anthonychrisbradley 3 years ago
and then you get to mirrors, light is the easiest topic.
illblanca 4 years ago
does the image always turn out smaller on the otherside
and do you know where i can get sheets like that
sorry i just have a test on monday and im kind of freaking out
unexpected02 4 years ago
The image can be bigger or smaller for a convex (converging) lens, but is always smaller for a concave (diverging) lens.
pegru001 4 years ago
check out explorelearning dot com, "browse gizmos", choose physics, "waves, sound and light", then launch the raytracing gizmo.
pegru001 4 years ago
(I have a URL for the sheet, but I can't get it to accept the comment...)
pegru001 4 years ago
oh and what does it mean when there is a 2f on my sheet?
unexpected02 4 years ago
...probably that something on the diagram is 2 focal lengths away from the lens.
pegru001 4 years ago
how do you whether it is a virtual or real image?
unexpected02 4 years ago
from the diagram: if the image is on the opposite side of the lens from the object, then it is real; if you have to trace the lines backwards so that the image and object are on the same side of the lens, then it is virtual
from real life: if you can get the image to show up on a piece of paper, then it's real
pegru001 4 years ago
oh alright thanks so much :)
unexpected02 4 years ago
Thanks dude, this actually helped my get my homework done.
rocer4ya 4 years ago