Vocab
Reflect
When light "bounces off" a surface. In the Path of Light model, the arrow changes direction at the surface of the material and moves back toward the eye.
Most Light __________ in glass
transmits
Glass is made of what material
Fully clear/transparent material.
The first part of the eye that the light has to pass through
pupil
Why does light reflect off of a one-way mirror
Light is bouncing off of the silver parts of the mirror
Transmit
When light "passes through" or "goes through" a material. This allows us to see objects on the other side of the material.
Very little light ______________ in glass
Reflects
First layer of a regular mirror
Glass
The second part of the eye that light has to pass through
Iris
Which material transmits the most light?
a) Glass
b) one-way mirror
c) regular mirror
a) glass
Refract
The bending of light as it passes from one transparent material into another (though primarily focused on straight-line travel in this unit).
Reflects
Second layer of a regular mirror
Solid layer of silvering
The third part of the eye that light has to pass through
Lens
T/F A material can both reflect some light (bounce off) and transmit some light (go through).
True
Transparent
A material property that allows light to transmit through it clearly (e.g., glass).
No light __________ in a regular mirror
Transmits
Third layer of a regular mirror
Paint
The fourth part of the eye that light has to pass through
Retina
T/f If light bounces off a material, the light is being transmitted.
False
Opaque
A material property where light cannot transmit through; it is either reflected or absorbed (e.g., the silver backing on a mirror).
Some light ________ and some light ______ in a one-way mirror
transmits and reflects
What is a one-way mirror made of
A plastic film with a thin, "half-silvered" layer of silver embedded in it.
What is the fifth part of the eye that light has to travel through
Optic nerve
A student investigates how different materials affect the amount of light that passes through them. The student shines the same flashlight at a regular mirror, glass, and a one-way mirror and measures the light in lux on the other side.
Question:
What is the independent variable and what is the dependent variable?
Independent: Type of material | Dependent: Amount of light that is reflected and transmitted.