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||<#dddddd> Grayed Demos are either not available or haven't been built yet.|| = 6J10. The Eye = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| || 6J10.00 || The Eye || || || 6J10.10 || eye model || || || 6J10.10 || eye model || || || 6J10.10 || model of the eye || Show a take apart model of the eye. || || 6J10.10 || eye model || The standard take apart eye model. || || 6J10.21 || water flask model of the eye || A large flask filled with water, a little fluorescein, and some external lenses make a model of the eye in near and far sighted conditions. || || 6J10.21 || eye models || A spherical lens filled with milky water represents the eyeball. Use a large lens in front of the sphere to show inverted image, near and far sightedness. || || 6J10.30 || blind spot || || || 6J10.30 || blind spot || Same as L-58. || || 6J10.30 || blind spot || Move a white cross toward a white spot on the blackboard while the students close one eye. || || 6J10.40 || inversion of image of retina || || || 6J10.40 || inversion of image on retina || A small tube has three holes in a triangular pattern drilled in one end and a single hole in the other. Hold the triangular end near the eye and the pattern appears inverted. || || 6J10.50 || astigmatism || Look at a chart of radial black lines. || || 6J10.55 || eyeglasses || Project an image of concentric circles crossed by radial lines. Place a lens and then a correcting lens over the projection lens. || || 6J10.60 || chromatic aberration of the eye || A purple filter is mounted in front of a straight filament lamp. || || 6J10.80 || resolving power of the eye || || || 6J10.80 || resolving power || The limit of resolving two filaments of an auto headlamp is 25 - 30 feet. ALSO - show slides of the "Navicula" made with green and UV light. Reference. || || 6J10.81 || resolving power with TV || || || 6J10.81 || resolving power || The camera zooms in on a vertical series of back illuminated double slits, each separated by half the distance of the preceding pair. || || 6J10.85 || Computer generated Sayce chart || A valuable background discussion on the resolution of the eye and a computer generated Sayce is shown. An external slit is used to stop down the eye pupil. || || 6J10.90 || locating images by parallax || An arrangement is shown for locating real and virtual images by parallax. || = 6J11. Physiology = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| || 6J11.00 || Physiology || || || 6J11.10 || retinal fatigue - color disc || || || 6J11.10 || retinal fatigue disc || A red light placed behind a rotating disc with a slot at the border of half black and half white appears different colors depending on the direction of rotation. || || 6J11.10 || retinal fatigue - color disk || A disk with a notch, half black, half white is spun in front of a red lamp. The lamp appears green or red depending on the direction that the disk spins. || || 6J11.11 || psychological colors || A black and white patterned disc appears colored when rotated. || || 6J11.20 || visual fatigue || || || 6J11.20 || visual fatigue || Stare at a bright spot and a complementary color appears when the spot is turned off. || || 6J11.22 || after image and judgement of size || The retinal fatigue image seems to change size. || || 6J11.30 || persistence of vision || || || 6J11.30 || persistence of vision || || || 6J11.30 || persistence of vision || A wheel with circles with phase shifted dots painted on the rim is spun in strobed light. || || 6J11.32 || colored fans || Paint a four bladed fan different colors and illuminate with a strobe. || || 6J11.33 || tubeless television || Wave a wand at the point a projected image is focused. || || 6J11.35 || integration of light pulses || If light intensity from a strobe that appears continuous at 3000 Hz is cut in half, it will appear continuous at about 1700 Hz. || || 6J11.36 || fluorescence of retina || Shine an UV source with a visible filter toward the class and notice the luminous haze that covers the field of view. || || 6J11.37 || jarring the eye || Stamp your foot while watching a free running oscilloscope. || || 6J11.40 || subjectivity of colors || A red spot projected on the wall looks orange or brown if it is surrounded by white or black. || || 6J11.42 || Mach disk || A spinning disk appears to have light and dark rings where it should be uniform. || || 6J11.44 || relative black and white || A bright light shining on a black screen looks the same as a filtered light shining on a white screen. || || 6J11.46 || most sensitive to green light || A stick moved up and down in a projected spectrum will appear to bend at the green light area. || || 6J11.50 || impossible triangles || || || 6J11.50 || impossible triangles || An optical illusion that depends on viewing angle. || || 6J11.51 || the square that ain't there || A cutout of a square in black paper has the illusion of being a white square on top of black paper. || || 6J11.52 || optical illusions || Compare the height to the width of a projected hat. || || 6J11.55 || perception || Many cases of optical perception are discussed along with some audio and misc. phenomena. || || 6J11.60 || depth perception - special case || Apparatus for demonstration of depth perception when due solely to the geometrical disparity of binocular vision. || || 6J11.70 || color blindness || || || 6J11.70 || color blindness || Use standard color-blindness slides or charts to test the students. || |
||<#dddddd>Grayed Demos are either not available or haven't been built yet. || |
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| [:Demonstrations:Demonstrations] | = 6J10. The Eye = ||<10% style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<style="text-align:center">'''Subsets'''||<60% style="text-align:center">'''Abstract''' || ||6J10.10 ||model of the eye || ||Show a take apart model of the eye. || ||6J10.10 ||eye model ||pira200||The standard take apart eye model. || ||6J10.21 ||water flask model of the eye || ||A large flask filled with water, a little fluorescein, and some external lenses make a model of the eye in near and far sighted conditions. || ||6J10.21 ||eye models || ||A spherical lens filled with milky water represents the eyeball. Use a large lens in front of the sphere to show inverted image, near and far sightedness. || ||6J10.30 ||blind spot || || || ||6J10.30 ||blind spot || ||Same as L-58. || ||6J10.30 ||blind spot || ||Move a white cross toward a white spot on the blackboard while the students close one eye. || ||6J10.40 ||inversion of image of retina || || || ||6J10.40 ||inversion of image on retina || ||A small tube has three holes in a triangular pattern drilled in one end and a single hole in the other. Hold the triangular end near the eye and the pattern appears inverted. || ||6J10.50 ||astigmatism || ||Look at a chart of radial black lines. || ||6J10.55 ||eyeglasses || ||Project an image of concentric circles crossed by radial lines. Place a lens and then a correcting lens over the projection lens. || ||6J10.60 ||chromatic aberration of the eye || ||A purple filter is mounted in front of a straight filament lamp. || ||6J10.80 ||resolving power of the eye || || || ||6J10.80 ||resolving power || ||The limit of resolving two filaments of an auto headlamp is 25 - 30 feet. ALSO - show slides of the "Navicula" made with green and UV light. Reference. || ||6J10.81 ||resolving power with TV || || || ||6J10.81 ||resolving power || ||The camera zooms in on a vertical series of back illuminated double slits, each separated by half the distance of the preceding pair. || ||6J10.85 ||Computer generated Sayce chart || ||A valuable background discussion on the resolution of the eye and a computer generated Sayce is shown. An external slit is used to stop down the eye pupil. || ||6J10.90 ||locating images by parallax || ||An arrangement is shown for locating real and virtual images by parallax. || |
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| [:Instructional:Home] | = 6J11. Physiology = ||<10% style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<style="text-align:center">'''Subsets'''||<60% style="text-align:center">'''Abstract''' || ||6J11.00 ||Physiology || || || ||6J11.10 ||retinal fatigue - color disc || || || ||6J11.10 ||retinal fatigue disc || ||A red light placed behind a rotating disc with a slot at the border of half black and half white appears different colors depending on the direction of rotation. || ||6J11.10 ||retinal fatigue - color disk || ||A disk with a notch, half black, half white is spun in front of a red lamp. The lamp appears green or red depending on the direction that the disk spins. || ||6J11.11 ||psychological colors || ||A black and white patterned disc appears colored when rotated. || ||6J11.20 ||visual fatigue || || || ||6J11.20 ||visual fatigue || ||Stare at a bright spot and a complementary color appears when the spot is turned off. || ||6J11.22 ||after image and judgement of size || ||The retinal fatigue image seems to change size. || ||6J11.30 ||persistence of vision || || || ||6J11.30 ||persistence of vision || || || ||6J11.30 ||persistence of vision || ||A wheel with circles with phase shifted dots painted on the rim is spun in strobed light. || ||6J11.32 ||colored fans || ||Paint a four bladed fan different colors and illuminate with a strobe. || ||6J11.33 ||tubeless television || ||Wave a wand at the point a projected image is focused. || ||6J11.35 ||integration of light pulses || ||If light intensity from a strobe that appears continuous at 3000 Hz is cut in half, it will appear continuous at about 1700 Hz. || ||6J11.36 ||fluorescence of retina || ||Shine an UV source with a visible filter toward the class and notice the luminous haze that covers the field of view. || ||6J11.37 ||jarring the eye || ||Stamp your foot while watching a free running oscilloscope. || ||6J11.40 ||subjectivity of colors || ||A red spot projected on the wall looks orange or brown if it is surrounded by white or black. || ||6J11.42 ||Mach disk || ||A spinning disk appears to have light and dark rings where it should be uniform. || ||6J11.44 ||relative black and white || ||A bright light shining on a black screen looks the same as a filtered light shining on a white screen. || ||6J11.46 ||most sensitive to green light || ||A stick moved up and down in a projected spectrum will appear to bend at the green light area. || ||6J11.50 ||impossible triangles || || || ||6J11.50 ||impossible triangles || ||An optical illusion that depends on viewing angle. || ||6J11.51 ||the square that ain't there || ||A cutout of a square in black paper has the illusion of being a white square on top of black paper. || ||6J11.52 ||optical illusions || ||Compare the height to the width of a projected hat. || ||6J11.55 ||perception || ||Many cases of optical perception are discussed along with some audio and misc. phenomena. || ||6J11.60 ||depth perception - special case || ||Apparatus for demonstration of depth perception when due solely to the geometrical disparity of binocular vision. || ||6J11.70 ||color blindness || || || ||6J11.70 ||color blindness || ||Use standard color-blindness slides or charts to test the students. || [[Demonstrations]] [[Instructional|Home]] |
The Eye
PIRA classification 6J
Grayed Demos are either not available or haven't been built yet. |
6J10. The Eye
PIRA # |
Demonstration Name |
Subsets |
Abstract |
6J10.10 |
model of the eye |
|
Show a take apart model of the eye. |
6J10.10 |
eye model |
pira200 |
The standard take apart eye model. |
6J10.21 |
water flask model of the eye |
|
A large flask filled with water, a little fluorescein, and some external lenses make a model of the eye in near and far sighted conditions. |
6J10.21 |
eye models |
|
A spherical lens filled with milky water represents the eyeball. Use a large lens in front of the sphere to show inverted image, near and far sightedness. |
6J10.30 |
blind spot |
|
|
6J10.30 |
blind spot |
|
Same as L-58. |
6J10.30 |
blind spot |
|
Move a white cross toward a white spot on the blackboard while the students close one eye. |
6J10.40 |
inversion of image of retina |
|
|
6J10.40 |
inversion of image on retina |
|
A small tube has three holes in a triangular pattern drilled in one end and a single hole in the other. Hold the triangular end near the eye and the pattern appears inverted. |
6J10.50 |
astigmatism |
|
Look at a chart of radial black lines. |
6J10.55 |
eyeglasses |
|
Project an image of concentric circles crossed by radial lines. Place a lens and then a correcting lens over the projection lens. |
6J10.60 |
chromatic aberration of the eye |
|
A purple filter is mounted in front of a straight filament lamp. |
6J10.80 |
resolving power of the eye |
|
|
6J10.80 |
resolving power |
|
The limit of resolving two filaments of an auto headlamp is 25 - 30 feet. ALSO - show slides of the "Navicula" made with green and UV light. Reference. |
6J10.81 |
resolving power with TV |
|
|
6J10.81 |
resolving power |
|
The camera zooms in on a vertical series of back illuminated double slits, each separated by half the distance of the preceding pair. |
6J10.85 |
Computer generated Sayce chart |
|
A valuable background discussion on the resolution of the eye and a computer generated Sayce is shown. An external slit is used to stop down the eye pupil. |
6J10.90 |
locating images by parallax |
|
An arrangement is shown for locating real and virtual images by parallax. |
6J11. Physiology
PIRA # |
Demonstration Name |
Subsets |
Abstract |
6J11.00 |
Physiology |
|
|
6J11.10 |
retinal fatigue - color disc |
|
|
6J11.10 |
retinal fatigue disc |
|
A red light placed behind a rotating disc with a slot at the border of half black and half white appears different colors depending on the direction of rotation. |
6J11.10 |
retinal fatigue - color disk |
|
A disk with a notch, half black, half white is spun in front of a red lamp. The lamp appears green or red depending on the direction that the disk spins. |
6J11.11 |
psychological colors |
|
A black and white patterned disc appears colored when rotated. |
6J11.20 |
visual fatigue |
|
|
6J11.20 |
visual fatigue |
|
Stare at a bright spot and a complementary color appears when the spot is turned off. |
6J11.22 |
after image and judgement of size |
|
The retinal fatigue image seems to change size. |
6J11.30 |
persistence of vision |
|
|
6J11.30 |
persistence of vision |
|
|
6J11.30 |
persistence of vision |
|
A wheel with circles with phase shifted dots painted on the rim is spun in strobed light. |
6J11.32 |
colored fans |
|
Paint a four bladed fan different colors and illuminate with a strobe. |
6J11.33 |
tubeless television |
|
Wave a wand at the point a projected image is focused. |
6J11.35 |
integration of light pulses |
|
If light intensity from a strobe that appears continuous at 3000 Hz is cut in half, it will appear continuous at about 1700 Hz. |
6J11.36 |
fluorescence of retina |
|
Shine an UV source with a visible filter toward the class and notice the luminous haze that covers the field of view. |
6J11.37 |
jarring the eye |
|
Stamp your foot while watching a free running oscilloscope. |
6J11.40 |
subjectivity of colors |
|
A red spot projected on the wall looks orange or brown if it is surrounded by white or black. |
6J11.42 |
Mach disk |
|
A spinning disk appears to have light and dark rings where it should be uniform. |
6J11.44 |
relative black and white |
|
A bright light shining on a black screen looks the same as a filtered light shining on a white screen. |
6J11.46 |
most sensitive to green light |
|
A stick moved up and down in a projected spectrum will appear to bend at the green light area. |
6J11.50 |
impossible triangles |
|
|
6J11.50 |
impossible triangles |
|
An optical illusion that depends on viewing angle. |
6J11.51 |
the square that ain't there |
|
A cutout of a square in black paper has the illusion of being a white square on top of black paper. |
6J11.52 |
optical illusions |
|
Compare the height to the width of a projected hat. |
6J11.55 |
perception |
|
Many cases of optical perception are discussed along with some audio and misc. phenomena. |
6J11.60 |
depth perception - special case |
|
Apparatus for demonstration of depth perception when due solely to the geometrical disparity of binocular vision. |
6J11.70 |
color blindness |
|
|
6J11.70 |
color blindness |
|
Use standard color-blindness slides or charts to test the students. |