1) The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?
<em><u>A) Contrast</u></em> B) Faces <span>C) Colors
2) </span>Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:
<em><u>A) The edges of objects</u></em> B) The center of objects <span>C) The color of an object </span> 3) What assumption does our visual system make in order to see curved surfaces (domes, holes)?
<em><u>A) Light comes from above</u></em> B) Curved surfaces are always evenly lit <span>C) Curved surfaces are always easy to see, no assumptions are made </span> 4) Which part of the face does our brain pay the most attention to?
<u><em>A) Eyes and mouth</em></u> B) Eyes and ears <span>C) Eyes and chin </span> 5) If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?
A) It helps us see things faster B) It helps us see things correctly C) It helps us pay attention to what's important <span><em><u>D) All of the above </u></em></span> Hope that helps :) *the correct answers are bolded, italicized, and underlined.*
For a standing wave on a string, the wavelength is equal to twice the length of the string: In our problem, L=50.0 cm=0.50 m, therefore the wavelength of the wave is
And the speed of the wave is given by the product between the frequency and the wavelength of the wave:
