5.1 Flashcards
What is a ray model of light
A representation where light is a straight line
What is partial model of light
A lantern flame was thought to release tiny particles of light, which travelled in a perfectly straight line until they enter an eye, where they were absorbed to make an image
What is a transparent material
Light can pass through it without changing there path
Translucent
Most light rays get through but are scattered in all directions
Opaque
Prevents any light to get through
What are three uses for the day model of light
To find where shadows will form.
If you are walking away from the sun will your shadow get bigger or smaller?
Bigger because it blocks the light rays behind you.
What does a surface need to be a mirror
It need to be smooth compared to a wavelength of the light striking the surface.
How does light reflect off a mirror
It the light strikes it straight on it bounces off straight. If it’s on an angle it bounces off on an angle
Is the light falling on black print being absorbed?
Yes
What is the incoming ray of light called
Incident ray
What is the opposite of the angle of incident?
Angle of reflection
How to you measure the angle of reflection or incident.
From the angle and the normal
