transparent:
transmits light, most all light passes through it and allows you to see clearly (Suran plastic wrap).
translucent:
scatters light as it allows light to pass through; you can see that objects are behind it, just not clearly (wax paper).
opaque:
reflects or absorbs all light, anything you cannot see through (aluminum foil).
primary colors:
blue, red, green.-
Make all other colors of light.
Equal amounts combined form white light.
combine to make any other color.
secondary colors:
magenta, cyan, yellow.-
It is a mixture of equal amounts of two primary/ produce.
complementary colors:
any pair of two colors that can create white light.
- primary + secondary.
pigment:
substances that absorb and reflect specific visible light colors.
ray:
straight lines (or arrow) used to represent light waves.
regular reflection:
rays of light hit a smooth surface, reflect at the same angle, and you see a sharp image.
image:
a copy of an object that is formed by reflected or refracted light.
diffuse reflection:
rays of light hit a bumpy/uneven surface, reflect at different angles, and you see a distorted image.
plane mirror:
a flat sheet of glass with a smooth silver-colored coating on the back side.
virtual image:
an upright image that forms where light seems to come from.
see it in a plane mirror.
concave mirror:
a mirror with a surface that curves inward like the inside of a bowl.
optical axis:
the imaginary line that divides a mirror in half.
focal point:
the point at which parallel rays to the optical axis meet.
real image:
an upside down image that forms when rays from a concave mirror meet.
convex mirror:
a mirror with a surface that curves outward.
mirage:
an image of a distant object cause by refraction of light.
concave lens:
thinner in the center than at the edge.
convex lens:
thicker in the center than at the edge.
index of refraction:
the measurement of how much a ray of light bends when it enters that material.
camera:
records an image of an object.
telescope:
forms enlarged images of distant objects.
what determines the color of an opaque object?
the color of light that it reflects. Everything else.
list and describe the functions of 5 parts of the eye:
lens- reflects light back into the eye.
iris- muscles that expand and contract the pupil.
retina- layer of the tissue that lines the inside of the eyeball.
cornea- light enters through the transparent surface.
optic nerve- carries the signals to the brain
as pigments are added together, what happens to the number of lights that are reflected?
fewer colors are reflected and more colors are absorbed.
why would it be more important to position a mirror at a 90 degree angle?
you want the actual image, not something that is elongated or stretched out.
a convex mirror produced what kind of image?
a virtual image that is always smaller than the original.
draw the shape of a convex and concave lens:
what determines the type of image formed by a lens?
depends on the shape of the lens and position of the object.
how can you correct nearsightedness and farsightedness?
nearsightedness- concave lens.
farsightedness- convex lens.
what is the lens of our eye held in place by?
ring of fibrous tissue and the sclera.
what happens to light as it passes through a lens of a camera?
real upside-down image in the back of the camera is formed.
Light can be...
reflected, absorbed, or transmitted.
colors of opaque objects- It is the...
wavelength of REFLECTED light.
Colors of Transparent or Translucent Objects- it is the....
wavelength of light that is transmitted.
More ...=
More ...=
...
pigments; absorbed; Less reflected.
In a plane mirror, ...
the virtual image is the same size as the object.
Angle of ... = Angle of ...
Incidence; Reflection.
In a concave mirror, ...
the real image can be smaller or larger.
The ... the mirror is ? ...
more curved; the closer the focal point will be to the mirror.
concave mirror: The ... depends on how ...
characteristics of the image; close the object is to the mirror in relationship to the mirror's focal point.
concave mirror: Size?
type of images?
way the image is?
smaller, same, larger; Real vs. Virtual image; Upright vs. Upside down image.
convex mirror: Curve?
image? why?
size of the image? why?
outward; Virtual image because rays never meet; Smaller image because the focal point is behind the mirror.
What determines the types of images produced from different types of mirrors?
The characteristics of the image depends on the position of the object relative to the focal point of the mirror.
If the object is at the ...
focal point of a concave mirror, no image is produced.
If the object is ... of a concave mirror, or you are using a convex mirror, ...
inside the focal point; the rules are applied to help you determine the angles of reflection.
refraction: Most all materials ...
SLOW down light.
The images produced from lens types...
are opposites from mirror types.
What type of mirror spreads out the light and makes the virtual image upright and small?
convex mirror.
What type of lens spreads out the light and makes the virtual image upright and small?
concave lens.
Explore using each type of lens and describe the type of images...
produced from each one.
when 3 ... colors of ... are combined in equal amounts, ...
primary; pigments; they produce black.
the 2 ways in which a surface can reflect light are ...
regular and diffuse reflection.
... mirrors can produce ... or ... images.
concave; real; virtual.
when light rays enter a ... , ...
new medium; the change in speed causes the rays to bend.
the type of images formed by a lens depends on ...
the shape of the lens and the position of the object.
you see objects when a process occurs that involves ...
both your eyes and your brain.
the lenses in a camera ...
focus light to form a real, upside-down image in the back of the camera.
telescopes use ... or ... ...
lenses; mirrors; to collect and focus light from distant objects.
a microscope uses a combination of ...
lenses to produce and magnify an image.