Author Topic: Ray tracing of image forms with one or two combined convex/concave lens  (Read 21639 times)

Fu-Kwun Hwang

• Hero Member
• Posts: 3062
Ray tracing of image forms with one or two combined convex/concave lens
« on: July 19, 2009, 06:10:49 pm »
The following applet shows light paths for converging lens.
Initially, there is only one convex lens.
The blue arrow represents object and green arrow is the image.
You can drag objec position and change it's height (drag arrow tip), too.
Two small cyan dots represent focus points (d 8)rag it to change focus length of the lens).
Drag the center of the lens to change it's location. Drag top of the lens to change the height of the lens.
For the first lens: \$   frac{1}{P_1}+   frac{1}{q_1}=   frac{1}{f_1}\$

Click 2nd Lens to add another convex lens. You can study how light paths were refracted to form the image.
If the separation between two lens is \$d\$, and assume second lens is at the right side of the first lens.
Then, \$p_2=d-q_1\$ , and the images form can be found at \$   frac{1}{q_2}=   frac{1}{f_2}-   frac{1}{p_2}\$.

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!

lookang

• Hero Member
• Posts: 1772
• http://weelookang.blogspot.com
Re: Ray tracing of image forms with one or two combined convex lens
« Reply #1 on: July 20, 2009, 08:51:10 am »
i like this simulation.
I was able to
1.study how the marginal lights rays are implemented.

next
i will try to implement many rays based on the marginal codes!

lookang

• Hero Member
• Posts: 1772
• http://weelookang.blogspot.com
Re: Ray tracing of image forms with one or two combined convex lens
« Reply #2 on: July 21, 2009, 10:55:22 am »
\$   frac{1}{P_1}+   frac{1}{q_1}=   frac{1}{f_1}\$

how to write equations in this forum? it is cool but i dont think it is default in SMF right?
\$ frac{1}{P_1}+ frac{1}{q_1}= frac{1}{f_1}\$

Fu-Kwun Hwang

• Hero Member
• Posts: 3062
Re: Ray tracing of image forms with one or two combined convex lens
« Reply #3 on: July 22, 2009, 09:28:45 am »
Type the following syntax to show the above equation:
\$frac{1}{p}+frac{1}{q}=frac{1}{f}\$

However, you need to add \$ sign before and after the equation.

lookang

• Hero Member
• Posts: 1772
• http://weelookang.blogspot.com
Re: Ray tracing of image forms with one or two combined convex lens
« Reply #4 on: July 22, 2009, 12:54:28 pm »
\$alpha\$

ok i understand how to do that is this forum, but i can't do the same for my own forum http://66.7.205.91/~lookangc/index.php?topic=1005.msg2003#msg2003

can explain what mods needs to be done?

i actually use α
[html]α[/html]
« Last Edit: July 22, 2009, 12:57:35 pm by lookang »

Fu-Kwun Hwang

• Hero Member
• Posts: 3062
Re: Ray tracing of image forms with one or two combined convex lens
« Reply #5 on: July 22, 2009, 11:38:57 pm »
I use the math equation code from MediaWiki and add my own code to make it work in this forum.

diinxcom

• Newbie
• Posts: -25
• Designer
Re: Ray tracing of image forms with one or two combined convex/concave lens
« Reply #6 on: December 14, 2014, 07:14:37 pm »
Just bookmarking first.
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