presentsa               productionSight and Wave  Phenomena        1
Inside the eyeLearn the labellingVitreous humour  of the eye       Aqueous humour                        Optic nerve      ...
Inside the eye Learn the functions of the eye partsAqueous humour             Retina Fovea Lens                           ...
AccommodationHow the ciliary muscles shape the lens to focus light                         Near point The closest         ...
Depth of vision                    Depth of vision refers to                   the ability to see things in               ...
Rods and cones       Two types of receptor cell in the retina                                   Cones: detect colour and  ...
Retina                         The graph shows that cones                        are concentrated at the fovea            ...
Colour blindness The commonest form is red-green, which  is caused by problems in the cones. It is    genetically inerited...
RedGreenBlue     The continuous spectrum of visible light can be    reduced for sense perception purposes to three     Pri...
Colour mixing   Additive mixing eg  Primary Colours:      light bulbs     Cyan, Magenta,Yellow   Primary Colours:   Second...
Perception  Lighting effects can affect the way we see things.                                  Shadow = solidityBlue = co...
Image of mouse retina: Thomas Deerinck                  12
a                                       production          MUCH MORE AThttp://nothingnerdy.wikispaces.comhttp://nothingne...
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IB Sl Physics Sight and Waves Flippingphysics by Nothingnerdy

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Slideshow on Sight and Waves for SL Physics option. Flippingphysics by Nothingnerdy.

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  • IB Sl Physics Sight and Waves Flippingphysics by Nothingnerdy

    1. 1. presentsa productionSight and Wave Phenomena 1
    2. 2. Inside the eyeLearn the labellingVitreous humour of the eye Aqueous humour Optic nerve Fovea Retina Blind spot Lens Pupil Cornea Iris 2 Ciliary muscle
    3. 3. Inside the eye Learn the functions of the eye partsAqueous humour Retina Fovea Lens Optic nervePupilCornea Iris Blind spot Ciliary muscle Vitreous humour 3
    4. 4. AccommodationHow the ciliary muscles shape the lens to focus light Near point The closest distance that an eye can focus. Conventionally, this is 25 cm. Far point The furthest distance that an eye can focus (ciliary muscles relaxed). Conventionally, 4 this is at infinity.
    5. 5. Depth of vision Depth of vision refers to the ability to see things in three dimensions and thus to judge distance. The different cues we use to see 3D are: Relative sizes of objects;perspective; parallax; binocular vision (using two eyes) 5
    6. 6. Rods and cones Two types of receptor cell in the retina Cones: detect colour and visual acuity (sharpness). There are three types of cone which are sensitive to different wavelengths of light. Red (long λ, 560 nm)Rods: detect movement and low Green (medium, 530 nm)light intensity. Very sensitive to Blue (short, 430 nm) light but not colour. 6
    7. 7. Retina The graph shows that cones are concentrated at the fovea where there are no rods. The rods are spread more evenly. Photopic vision = Scotopic vision = nocolour under normal colour, dim light ie thelighting ie the cones 7 rods
    8. 8. Colour blindness The commonest form is red-green, which is caused by problems in the cones. It is genetically inerited, usually by males. The Ishihara test is used to identify colour- blindness. This is a simulation of how people see the top left image. Deuteranomaly is the most common due to a mutation in 8 the green pigment.
    9. 9. RedGreenBlue The continuous spectrum of visible light can be reduced for sense perception purposes to three Primary colours: Red, Green and Blue (R, B, G).Red light contains only R and no B or GRed objects reflect only R and absorb B and GRed filters transmit only R and absorb B and G 9
    10. 10. Colour mixing Additive mixing eg Primary Colours: light bulbs Cyan, Magenta,Yellow Primary Colours: Secondary Colours: Red, Blue, Green Red, Blue, Green Secondary Colours: Subtractive mixing Cyan, Magenta,Yellow eg filters
    11. 11. Perception Lighting effects can affect the way we see things. Shadow = solidityBlue = cold The warmer tones are nearer to the red endOrange = warm of the visible spectrum. 11
    12. 12. Image of mouse retina: Thomas Deerinck 12
    13. 13. a production MUCH MORE AThttp://nothingnerdy.wikispaces.comhttp://nothingnerdy.wikispaces.com/IGCSE+RADIOACTIVITY 13

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