Light Waves
Light travels in this kind of line.
A straight line
What do we call it when light bounces off a surface?
Reflection
When light bends as it moves between materials
What part of the eye controls how much light enters?
The iris
Light can go through this type of material completely.
Transparent
What type of wave is light? - Transverse or longitudinal?
Transverse
What do we call the angle at which the light hits a surface?
The angle of incidence
Name one material that causes light to refract.
Water, glass, or plastic
What part of the eye lets the light in?
The pupil
This type of material lets some light through, but not all
Translucent
Light travels fastest in which of the following: air, water, or glass?
What do we call the angle at which the light bounces off?
The angle of reflection
Does the light speed up or slow-down in water compared to air?
Slow-down
What part focuses the light in the eye?
The lens
This type of material blocks all the light
Opaque
True or False: Light can travel through a vacuum?
True
If the angle of incidence is 78 degrees, what is the angle of reflection?
78 degrees
Which medium bends light more?
Air or glass
What part of the eye receives the image like a screen?
The retina
Sunglasses are an example of this kind of material
Translucent (or partly transparent)
Light waves do not need this to travel, unlike sound waves.
A medium
What do we call the line drawn at 90 degrees to the surface where light hits?
The normal line
True or False: Light always bends the same way no matter the materials.
False
The optic nerve
A wall is an example of this type of material
Opaque