Is needed to produce a photograph.

It is a radiant electromagnetic energy that can be seen by the naked eye.

the foundation of the modern world.

Are similar to ocean waves and that both are energy waves, they transmit energy

Longest electromagnetic wave but with lowest energy

Shortest wavelength but with highest energy waves

The average speed of light is _____________

The distance between crest is called _________

The Electromagnetic Spectrum is divided into two the ___________

The light that cannot be detected by the naked eye is called the _________________.

have the longest wavelength but they have the lowest frequency. We use ___________ to send radio and television signals all around the world.

have the second longest wavelength. We use _________ in satellite communication, microwave cooking, and for RADAR

produced by any hot bodies such as human and the sun. is used to cook food in conventional ovens.are also used in optical fibers for communication and even our TV’s remote control uses this kind of waves. In addition, chemist and forensic scientists use infrared spectrometry to identify the characteristics of many molecules.

The main source of this is the sun. It is used to pick up invisible writings like in bank notes. It is also used by scientists to detect traces of blood and to analyze organic compound

have very short wavelength; they are able to penetrate many things.

is used to kill cancer cells, sterilize equipment, and to increase the shelve life of food.

a range of visible light that produces different sensation when they strike human eyes.

The wavelength that will produce white light is

in 1666, proved that the light we see as white is a mixture of all colors of the spectrum.

When light falls on any material, the light is either ______

The reflected light rays are the one that affect the eyes.

A light that travels in straight lines are called _________

When light bounces off of an object or a surface

States that when a ray of light is reflected from a smooth surface, the angle of reflection is equal to the angle of incidence, and the incident ray, the reflected ray, and the normal to the surface at the point of incidence all lay in the same plane.

stream of light with the smallest possible cross-sectional are.

defined as a ray approaching a surface whereby the point of incidence is where the ___________ strikes a surface

is a construction line drawn perpendicular to the surface at the point of incidence

is the angle between the incident ray and the normal.

is the angle between the normal and the reflected ray

TWO KINDS OF REFLECTED LIGHT

the mirror-like reflection of light (or of other kinds of wave) from a surface, in which light from a single incoming direction (a ray) is reflected into a single outgoing direction.

the reflection of light from a surface such that an incident ray is reflected at many angles rather than at just one angle as in the case of specular reflection.

A material transmits light when it allows the light to pass through it.

allow all the light to pass through them so that you can easily see what is on the other side such as glass, water, and air.

scatter the light that passes through them you can tell that something is on the other side, but you cannot see details clearly

The change in the direction of light is conclusive whenever light passes from one medium to another, is known as the

___________causes the light to bend taking direction according to _____________

states that when light travels from one medium to another; it generally bends, or refracts.

who discovered the refraction

Two categories sources of light

the light from sun, moon and stars.

light from man-made sources

Kinds of lighting Situation

it travels from a point source directly to the subject. Shadows created from this light are harsh and deep.

an example of ____________ is an overcast day, when the light appears evenly and there is no distinct shadow.

Sources of Natural Light

the most important source of light on earth is the ____

The light from the sun travels through space at an incredible speed of ____________ and reaches the earth in ____________________

the most popular and mostly used light source of photographers

sunlight is classified into:

Images taken with __________ is characterized by extreme highlights and deep shadows. It provides the highest contrast in a picture.

It produces soft shadows and moderate highlight.

It does not cast practical shadows on your subject

It provides no shadows and low contrast.

It provides very poor contrast

The first man-made light was _____.

examples of artificial sources of light:

it is used when backlighting is present and shadows obscure the object.

it is a quick burst of light like that on-camera flash unit, with much greater intensity

it is popularly used to illuminate buildings, garage, parks, airport, tarpaulin billboards, etc.

it has the unique light angle direction that comes from front overhead lamp post.

is great for photographing outdoor subjects. This light source with its strong intensity usually illuminates subjects as the main light

different kinds of light angles:

Qualities of Light

it generatesdark shadows while highlights are saturated and harsh

it creates softedges between shadows and highlights

is the existing light in a room, in a coliseum or in a covered basketball court.

This color is made of seven colors; Red, orange, yellow, green, blue, indigo, and violet

ROYBGIV color are also called _________

the main colors in light

Red, Green and Blue are also called ________