Light Section 4
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MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
Let’s review a mite
Photo by Samuel Zeller
Luminous versus non luminous
Photo by Krystal Ng
Translucent, transparent & opaque
Photo by bogdog Dan
Law of reflection
Diffuse & regular
Photo by Werner Kunz
Concave mirrors reflect toward what?
How does that relate to a radio telescope?
Photo by Tom Coates
Refraction happens when light .....?
Photo by "The Wanderer's Eye Photography"
A refracted ray bends toward or away from the normal?
Photo by Brianna Turner
Which lens bends light towards a focal point, a double convex or a double concave?
Photo by benjaflynn
Define
Amplitude
Frequency
Wavelength
Photo by Pulpolux !!!
A rainbow is white light being refracted into the different colours of visible light. Red has the shorter or longer wavelength?
Photo by DeeAshley
Your black shirt reflects what colour of light?
Your yellow shirt absorbs?
Photo by Brooke Cagle
Eyes and How they function
Page 231
Photo by Thomas Tolkien
Cornea
Iris
Pupil
Lens
Retina
Optic nerve
Pupil acts like the f-stop (aperture) of a camera p232.
Photo by Daniil Kuželev
Light reaches retina, photoreceptors are light sensitive (rod for light, cones for colour). Messages sent to optic nerve (see p233 blind spot)
Photo by Kalea Jerielle
Vision correction using lenses.
A lens is added to either lengthen or shorten the focal length so it resides on the retina.
Photo by kenteegardin
Structural adaptations allow for specialized vision in other animals. P236 and see app
Photo by Akshay Madan
Fish have a spherical lens for better field of view.
Birds have two more types of cones than humans - better colour vision.
Photo by fabiogis50
Nocturnal animals have tapetum lucidum. Mirror-like light collector. Also more rods for low light.
Photo by Linnea Sandbakk
Compound eyes
Insects and crustaceans have ommatidium in clusters. The more of them, the more detailed an image. P238
Photo by timku
Digital Image Quality p242
The more pixels per unit of surface area = higher the resolution. The more storage too.
Photo by Joanna Nix
