3RD MEETING DISCUSSION Flashcards
LIGHT
Also called as pencil of light. The path of which light travels in any direction.
(A bundle of photons of light)
RAY OF LIGHT
A group of light rays that travels in given direction.
(A bundle of “RAYS” of light)
BEAM OF LIGHT
Categories of beam of light
CONVERGENT AND DIVERGENT
Categories of beam of light: Group of light rays that converge from a point source to a given single point
CONVERGENT BEAM
Categories of beam of light: from a light source travel NEVER able to CONVERGE to a certain point… not unless towards a certain point.
DIVERGENT BEAM
We define infinity as to what measurement?
6M OR 20FT BEYOND
- Also known as light source.
- A light that emits a SINGLE, INFINITELY SMALL POINT in space an radiates light equally in all directions.
- We use this term instead of light source because “Not all objects emit light, but rather reflect or radiate light.”
POINT SOURCE
- also known as BASE LINE.
- Imaginary base line that is used to measure:
“the angle of incidence of light as well as its corresponding behavior such as reflection and refraction.” - Used so that we can have accurate measurements.
NORMAL LINE
Ang ray of light nga mo-travel gikan sa light source padulong sa surface before siya mo-reflect at a given angle.
INCIDENT RAY
The bouncing back of light on a smooth surface or any object that is able to reflect light
REFLECTED RAY
The deviation in the path of light rays when the incident ray travels from one medium to another of different index of refraction.
REFRACTED RAY
A phenomenon of change in the path of light rays without any change in the medium; it is a light
phenomenon that allows us to see.
REFLECTION OF LIGHT
Another phenomenon that can also be reflected.
SOUND
The reason we are able to precieve or see an object and
precieve its color - of that particular object is because of-?
REFLECTION
Components of different colors (ROYGBIV)
PURE LIGHT
The different (blank) slows down the different
velocities of the different components of the pure light.
INDEX OF REFRACTION
TWO TYPES OF REFLECTION
SPECULAR AND DIFFUSE
An incident ray traveling towards a smooth surface where it rays are going in the same direction.
Occurs at regular surface at regualr surfaces such as plane mirrors and form images
SPECULAR REFLECTION
Any reflection that occurs at varying angles due to uneven reflective surface.
DIFFUSE REFLECTION
“The incident ray and reflected ray lie in one plane at the point of incidence but on the opposite sides of the normal to the surface.” Law #?
1
“The angle of incidence is equal to the angle of reflection” (<i = <r) Law #?
2
A phenomenon where light, after being reflected off a surface, is directed back toward the source (or nearly back), regardless of the angle at which it originally arrived.
RETROREFLECTION
“The lights are reversible and sometimes result in a phenomenon called RETROREFLECTION.” Law #?
3
Ex. 1 Of instruments that applies this law 3
AUTOMATIC REFRACTOMETER
Ex. 2 Of instruments that applies this law 3
RETINOSCOPE
A kind of reflex that uses the law retroreflection
RED-ORANGE REFLEX
A plane sheet of glass whose one side is silvered and the other side is polished. Also known as the “LOOKING MIRROR”
PLANE MIRROR
Images with the ff:
* same size as the objects
* Lies at the same distance behind the mirror as the object is in front.
* Virtually and laterally inverted (pre-verted). (Virtual - not real or actual)
are formed by?
PLANE MIRROR
Parts of a HOLLOW SPHERE whose one side is silvered and the other is polished.
SPHERICAL MIRROR
Kinds of spherical mirrors
CONCAVE AND CONVEX
A curved mirror whose reflecting surface is TOWARDS the center of the sphere.
CONCAVE
A curved mirror whose reflecting is AWAY from the center of the sphere.
CONVEX
In prisms, when light passes through it, it bents from (BLANK) to (BLANK)
APEX, BASE
“In a homogenous transparent medium or VACUUM, light travels in a straight line.” (Unless absorbed,
refracted or reflected.)
RECTILINEAR PROPAGATION
A type of mirror that converge light rays
CONCAVE
A type of mirror that diverge light rays
CONVEX
