Topic 1
What is light?
A form of energy that you can see
How does reflection occur?
When light bounces off of something
What is refraction?
Refraction is the bending of light when it travels from one medium to another
When the angle of _______ increases, the angle of refraction _______.
Incidence
Increases
What is an example of a convex mirror?
Spoon, magnifying glass
What is radiant energy?
Lght that travels by radiation
What is an incident ray?
An incident ray is the light that's coming directly from the light sources.
Why does light bend?
It changes speed when it goes through different mediums
What is an example of a concave mirror?
Spoon, car headlights, magnifying glass
What is the difference between man-made light and natural light?
Natural light sources are things found in nature that produce light. Man-made light sources are things made my humans that produce light.
What are 3 types of energy?
Thermal, Electrical and Light energy.
What is the angle of incidence?
The angle of incidence is the angle between the incident ray and the normal line.
What happens when light enters a more dense medium from one that is less dense?
It'll bend away from the line of normal.
What gives off heat?
Flourescent or Incandescent?
Incandescent
What is the normal line?
It divides the incident ray and the reflected ray.
How does light react when it strikes transparent material? Translucent? Opaque?
Transparent: All light goes through
Translucent: Some light goes through
Opaque: No light goes through
What is the angle of reflection?
The angle of reflection is the angle between the reflected ray and the normal line.
Why does light bend?
Different temperatures have different densities, so it bends.
What is the difference between a convex mirror and a concave mirror?
Convex curves outward and concave curves inward.
What is a plane mirror?
A mirror with a flat reflective surface.
What is the first basic principle of light?
Light is a form of energy made up of protons that can transform into other kinds of energy.
What is the law of reflection?
Angle of Incidence = Angle of Reflection
How does a mirage form?
- The air near the ground is hotter and less dense.
- Light from the sky is directed at the ground is bent up into the less dense air.
Which type of mirror's reflection apears upsidedown?
Concave
What is the name of this unit?
Light and Optical Systems