Topic 1
Identify 3 sources of Light Energy
Electrical Energy, Thermal Energy and Chemical Energy
This type of material does not allow any light to pass through it.
Opaque
How does the tapetum lucidum help nocturnal animals?
A layer in the eye that acts as a mirror, reflecting light into nocturnal animal eyes
The change in direction of a light ray when it passes through something and "bends"
Refraction
True or False: Diffuse reflection occurs when light strikes a rough surface
True
What did Pythagoras hypothesize about light?
Light beams extend from the viewer to the object being viewed
Finish the statement: The denser the new medium the more the light _______ ________
Slows Down
The structure that controls the amount of light that enters the eye.
Iris
Does not produce light. Light is reflected from a light source.
Non-Luminous
Draw a Convex Lens and a Concave Lens. Diagram must include what happens once light hits the lens. Must have both drawings correct to get full points.
See Ms.Glatz's Drawings
1. Light Travels in Straight Lines
2. Light can be reflected
3. Light can bend
4. Light is a form of Energy
What is the normal?
The line perpendicular to the mirror
What structure in a digital camera would be most similar to film in a simple camera?
Charged Coupled Device (CCD)
Explain the difference between translucent and transparent. Give an example of both.
Translucent: allows some light to pass through but not all (sheer drapes)
Transparent: can transmit light (window)
True or False: Refracting Telescopes use curved mirrors and lenses to view the planets
False
Describe a Refracting Telescope.
A refracting telescope has two lenses, one on each end of the long tube. It gathers the light and focuses the rays towards the eyepiece.
Draw the correct path of light, include a mirror, the normal, and the angle of incidence and refection in your diagram to get full points.
See Ms. Glatz's Drawing
The difference between being nearsighted and farsighted is farsighted people ... must use the location of the focal point in answer.
farsighted people cannot see near objects clearly because their lens focal point is behind the eye
A flat mirror with no curvature
Plane Mirror
How does a church stained glass window depicting the nativity scene using coloured glass separated by metal dividers interacts with the light?
Translucent and Opaque
Describe a Reflecting Telescope.
A reflecting telescope uses two mirrors to REFLECT light.
For a concave mirror, when the object is placed far away from the focal point, the image appears ______ ________
upside down
Describe the difference between Rods and Cones
Rods are highly sensitive to light and work in low-light situations
Cones help detect color and cannot function in low light settings.
A layer on the front part of the eye that refracts light towards the pupil
Cornea
What is the difference between a high resolution digital camera and a low resolution digital camera?
high resolution cameras use more pixels and have higher quality images.