![English](/tpl/images/cats/en.png)
During a lesson on light and vision, Mr. MartĂnez gave his students a special image called an optical illusion. Everyone said that
they saw a spiral that started at the outside edge of the page and went into the center. Then Mr. Martinez asked the students to
trace the spiral with a pencil. The students discovered that there was no spiral. they were looking at a series of circles.
A)Directly
B)Sometimes
C)Instead
D)Already
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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During a lesson on light and vision, Mr. MartĂnez gave his students a special image called an optica...
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