NTNUJAVA Virtual Physics Laboratory
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Easy Java Simulations (2001- ) => illusion => Topic started by: Fu-Kwun Hwang on January 01, 2011, 04:01:32 pm



Title: Is AC or BC a straight line?
Post by: Fu-Kwun Hwang on January 01, 2011, 04:01:32 pm
Is AC or BC a straight line?

Move mouse inside box and find out the answer?

You can drag the two sliders and study effect due to width/distance!


Title: Re: Is AC or BC a straight line?
Post by: lookang on January 03, 2011, 10:18:38 am
very interesting!

what is a good source of  information regarding this kinds of illusion? is it http://en.wikipedia.org/wiki/Illusion ?

i need to understand why the human brains works that way?
as in why did i find the AC a straight line i mean :)

it is because of my prior knowledge in life (looking at physics phenomena of refractive index of glass)?

by the way, there is an optical illusion that i could not believe.
very interesting too
http://en.wikipedia.org/wiki/Same_color_illusion
(http://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Grey_square_optical_illusion.PNG/360px-Grey_square_optical_illusion.PNG)
Areas of the image A and B are the same color.

(http://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Same_color_illusion_proof2.png/360px-Same_color_illusion_proof2.png)
A rectangle of the same color has been drawn connecting the two areas of the image


Title: Re: Is AC or BC a straight line?
Post by: Fu-Kwun Hwang on January 03, 2011, 11:04:36 am
I just created another applet : illusion: Two identical color dots? (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2050.0) or illusion: The same color illusion (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2051.0)
for the effect you are interested in.


Title: Re: Is AC or BC a straight line?
Post by: Fu-Kwun Hwang on June 30, 2011, 10:00:49 pm
Drag line at left until you think it is align with blue line at right side.
Then, click show check box to find out how good your guest is.

Click show2, then drag index n to see at what value it will meet with your prediction.
(the second line was calculated with snell's law $n_1*\sin\theta_1=n_2 \sin\theta_2$