Psych312_Week2Lecture1_Light&TheEye.pdf

Psych312_Week2Lecture1_Light&TheEye.pdf - LIGHT AND THE...

Info icon This preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
LIGHT AND THE EYE
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image Focusing: Object distance Object distance (s o ): Distance of a light-reflecting object from the lens Object distance (s o )
Image of page 2
Image Focusing: Image distance Object distance (s o ) Image distance (s i ) Image distance (s i ): Distance of an object’s image from the lens Image distance (s i ) Object distance (s o ) =
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image Focusing: Focal distance Focal distance (f): Image distance when the object distance is infinity Focal distance (f) Object distance (s o ) Image distance (s i ) Focal distance (f) = Image distance (s i ) Object distance (s o ) =
Image of page 4
Image Focusing: Focal distance Focal distance (f) Focal distance (f) Focal distance (f): Image distance when the object distance is infinity Indicates the lens strength (amount of refraction)
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image Focusing: The eye Cornea does 2/3 of refraction (light bending) Fixed refracting power Lens does 1/3 of refraction Variable refracting power Accommodation Image distance in the eye is fixed
Image of page 6
Lens accommodation Ciliary muscle contracts zonule fibers become looser lens becomes thicker
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Unaccommodated lens: s i > eyeball length and image appears blurry Image Focusing: The eye Accommodated lens: s i = eyeball length and image appears crisp
Image of page 8
Image focusing: Thin lens formula Distance form of the thin lens formula : 1/f = 1/s i + 1/s o Focal distance Image distance Focal distance Object distance (s o ) Image distance (s i ) Object distance
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image focusing: Thin lens formula Distance form of the thin lens formula : 1/f = 1/s i + 1/s o Focal distance Image distance Object distance In the human eye, image distance is fixed s i = 0.0167 m
Image of page 10
Image focusing: Thin lens formula Diopters describe lens strength Focal distance (f) Focal distance (f) Shorter focal distance = more diopters
Image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern