Night Vision and Color Perception
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Questions and Answers

Based on the text, what caused the traveler to climb into the wrong car?

  • The traveler couldn't easily tell which car was red and which was brown (correct)
  • The traveler was distracted by the dim light
  • The rental agency bus driver pointed to the wrong car
  • The traveler was in a hurry and didn't pay attention

    • Why did the traveler give up on using the city map?

  • The traveler didn't need the map anymore
  • The traveler couldn't read the printed street names on the map (correct)
  • The traveler realized he had taken the wrong car
  • The traveler found a better way to navigate

    • What made it difficult for the traveler to find the wiper switch?

  • The rapid traffic closing behind him
  • The dark printed labels on the switch (correct)
  • The rain streaming down the windshield
  • The bright glare of headlights in his rearview mirror

    • According to the text, what is one of the influences on contrast sensitivity?

    <p>Level of illumination</p> Signup and view all the answers

    What is the relationship between lower contrasts and discernibility?

    <p>Lower contrasts are less easily discerned</p> Signup and view all the answers

    What is the effect of printing black text against a blue background, according to the text?

    <p>It reduces contrast sensitivity</p> Signup and view all the answers

    Which type of visual receptor cells are exclusively found in the fovea?

    <p>Cones</p> Signup and view all the answers

    What is the relationship between acuity and the spacing of the receptor cells?

    <p>Acuity decreases with greater spacing of the receptor cells</p> Signup and view all the answers

    Which type of receptor cells have an advantage in terms of sensitivity?

    <p>Rods</p> Signup and view all the answers

    What is scotopic vision?

    <p>Vision when only rods are operating</p> Signup and view all the answers

    Which measure describes the lighting quality of a given working environment?

    <p>Illuminance</p> Signup and view all the answers

    What is the ratio that defines the reflectance of a surface?

    <p>Reflectance = illuminance / luminance</p> Signup and view all the answers

    Which measure determines the actual experience of visual intensity?

    <p>Luminance</p> Signup and view all the answers

    Which measure represents the actual light energy of a light source?

    <p>Luminous flux</p> Signup and view all the answers

    Which part of the eye is responsible for adjusting its shape to bring the image to a precise focus on the back surface of the eyeball?

    <p>Lens</p> Signup and view all the answers

    What is the resting state of accommodation in the eye?

    <p>The point where the lens is doing no work at all</p> Signup and view all the answers

    What is the measurement unit used to describe the amount of accommodation required to view an object at a certain distance?

    <p>Diopters</p> Signup and view all the answers

    Which visual angle formula can be used to approximate the visual angle of an object of height H, viewed at distance D?

    <p>VA = \arctan(H/D)</p> Signup and view all the answers

    Which visual sensory system is responsible for the ability to detect and recognize shapes?

    <p>Cones</p> Signup and view all the answers

    Which of the following is true about night driving in unfamiliar locations?

    <p>It is a hazardous endeavor</p> Signup and view all the answers

    What is contrast sensitivity?

    <p>The ability to detect contrast between lighter and darker spatial areas</p> Signup and view all the answers

    What determines the hue of a visual stimulus?

    <p>Wavelength</p> Signup and view all the answers

    What is the minimum separable acuity?

    <p>The width of light separating two dark lines</p> Signup and view all the answers

    What is the range of wavelengths typically visible to the human eye?

    <p>Short wavelengths of around 400 nm to long wavelengths of around 700 nm</p> Signup and view all the answers

    What spatial frequency is the human eye most sensitive to?

    <p>Around 3 c/d</p> Signup and view all the answers

    What is the CIE color system used for?

    <p>Describing the combination of primary colors to match a visual stimulus</p> Signup and view all the answers

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