Lesson One Lesson Two Lesson Three Lesson Four Lesson Five
What is the likeness of an object?
Image
What is a flat or level surface?
Plane
In science, what is a statement of a pattern, action, or condition that has been observed so consistently that scientists are convinced it will always happen?
Law
In a light bulb, What is the metal strip that glows to produce light?
Filament
What is the form of energy we can see?
Light
What is a non-human made source of light, such as the sun?
Natural Light source
What sends out energy in the form of waves or rays?
Radiation
What is energy transferred or emitted as waves or rays in all directions?
Radiant Energy
What is a human made source of light?
Artificial light source
What describes how much energy a surface will receive?
Intensity
What is an object that can be heated to such a high temperature that it emits visible light?
Incandescent source
What is the emission of visible light by a hot object?
Incandescence
What is the process in which high energy, invisible ultraviolet light is absorbed by the particles of an object, which then emits some of this energy as visible light, causing the object to glow?
Flouresence
What is a source that produces light when exposed to alight of particular wave length?
Fluoresent source
What is a substance that gives off visible light released after the light energy has been absorbed by certain particles that have stored this energy for a while; the light continues for some time even after the substance is no longer exposed to the light?
Phosphorescent source
What is the persistent emission of light following exposure to and removal of a source of radiation?
Phosphorescence
What is the emission of light resulting form chemical reactions and not involving heat?
Chemiluminescence
What is the chemical reaction that produces particle that give off visible light energy?
Chemiluminescent Source
What is the emission of light produced by chemical reactions inside the bodies of living creatures?
bioluminescence
What si an organism that relies on chemical reactions in side its body to produce light?
Bioluminecsent Source
What is an unit of power equivalent to one joule per second?
watt
What is a unit of electrical energy; the amount of energy transmitted by one thousand watts of power over a period of one hour?
Kilowatt hour
What is a presentation of the path of light by using a straight line with an arrow?
Ray Diagram
What allows some light to pass through it?
Translucent
What lets no light to pass through?
Opaque
What gives off its own light?
Luminous
What is not luminous?
Non-luminous
What casts back light from a surface?
Reflection
What is the light that strikes a reflection or fraction material?
Incident ray
What is the light that is cast back?
Reflected ray
What is a reference line down perpendicular?
Normal
In optics, what is the angle between the normal and the incident ray?
Angle of incidence
In optics, what is the angle between the normal and the reflected ray?
Angle of reflection
what is a mirror having a flat surface?
Plane mirror
What are the 2 main predictable behaviors of reflected light?
Laws of reflection
What is the type of refection that occurs?
Diffuse reflection
What is the bending g of light when it travels from one medium to another off a rough surface?
Refraction
In optics, what is the angle between the normal and the refraction ray?
Angle of refraction