Ray Tracing (Converging Lens)

Ray tracing diagram for a converging lens, with the object beyond twice the focal length. (yes, the light actually bends at both surfaces, not the middle of the lens...)

This video was made with a Samsung Document Camera (pretty much a digital video camera on a stick)

Category:

Howto & Style

Tags:

• lens
• ray
• tracing
• converging
• washburn
• physics

[legotransformersonic]

what if the lens is smaller than the image? How would that be drawn?

[pegru001]

@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]

is converging lens convex or concave

[pegru001]

@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).

[lutzweb]

Where can i download this exercize papers?

[pegru001]

@lutzweb

look for a raytracing document at

ww dot tc dot umn dot edu slash ~grul0005 slash washburn

[Stuu157]

thank you lots! was still confused about this and my exam is tomorrow :s

[rey619yomama]

HOLY CRAP THIS HELPS. my teacher never told me how to actually draw these so i never really understood the formulas.

[TheEihcnem]

pretty cool!

[k0z69]

Thanks, Helped heaps :)

[kakaroxox]

U are a life saver! i have my exam tomoro and i had no idea how to draw ray diagrams