INTERNET EXPLORER FUNDAMENTS
• Familiarize with the internet explorer windows
• Navigate the WEB using URL ang hyperlinks
• Familiarize in shopping via internet
• Browse through the google website
Search from the Address bar
Materials:
• 1 PC with pre-installed Microsoft Windows operating system and internet explorer 7.
• USB flash drive
Basic Principles
What is internet?
The internet reffered to as cyberspace,is a collection of local, regional, national, and international computer networks linked together to exchange data and distribute processing tasks.It is an interconnected network that uses the standard internet protocol suite(TCP/IP) to transport data.Individual networks are being managed by large computers which are then connected to the internet also know as the information highway.
What is Internet offers?
The internet was first developed when the research project of the US military agencies has been funded to build robust,fault-oriented,and distributed computer networksn
The Internet offers a vast set of resources w/c are useful to all users.
Electronic Mail-email is the oldest internet service,dating back to mid 1970s.
Information-any subject imaginable is available in the internet.
Programs-thousands of free programs or freeware are available in the internet.
Entertainment-different simple games are also available to be played on-line in the internet like poker etc.
Discussion groups-the internet is capable of mediating discussion groups w/ similar interests.
On-line Shopping-the internet offers a vast of resources in terms of providing services and selling goods.
Birth of the Internet
-The internet came into existence at the time of the cold war.
Internet Resources
-It is time to know how the internet works after we have learned how it began.
(NAPs)-networks access points
(TCP/IP)-transmission control protocol/internet protocol
Internet Connections
-A communication link must be established between a computer and the internet to fully benefit from it.
ADSL connections
-ADSL stands for asymmetric digital subscriber line connections w/ are becoming widely available tp provide an excellent internet connection.
These are the type of connection can be seen advertised in different speed specifications.
256kbps/128kbps
512kbps/128kbps
1mbps/256kbps
2mbps/512kbps
8mbps/1024kbps
Dial-up connection
-The earlier method of connecting to the internet is through a dial-up connection.
Cable connections
-This type of internet access is usually offered by cable companies to their consumers to have a faster internet connection by merely adding additional charges on their monthly bills.
High speed internet access
-Integrated services digital networks –(ISDN) is a digital transmission system used to transmit voice and datathrough copper telephone wires.
Internet services providers(ISP)
-In accessing the internet,an ISP is required to be connected to the internet backbone.
Factors in choosing an ISP
1) Geographical coverage
2) Type of service
3) Quality of service
4) Cost of equipment and installation
5) Extra services
6) Customer service
The World Wide Web
-Tim burners-lee in considered to be the founded of the worll wide web.
Browser
-A web browser or simply a browser is a software program installed in the computer that allows you to access he internet.
Friday, October 15, 2010
Tuesday, October 12, 2010
ELECTRICITY,MAGNETISM LIGHT
Electricity (from the New Latin ēlectricus, "amber-like"[a]) is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning and static electricity, but in addition, less familiar concepts, such as the electromagnetic field and electromagnetic induction.
Magnetism, a non-contact force, is a category of behavior of materials that respond at an atomic or subatomic level to an applied magnetic field. For example, the most well known form of magnetism is ferromagnetism such that some ferromagnetic materials produce their own persistent magnetic field. However, all materials are influenced to greater or lesser degree by the presence of a magnetic field. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a much more complex relationship with an applied magnetic field. Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, gases, and plastic.
The magnetic state (or phase) of a material depends on temperature (and other variables such as pressure and applied magnetic field) so that a material may exhibit more than one form of magnetism depending on its temperature, etc.
Light is electromagnetic radiation of a wavelength that is visible to the human eye (in a range from about 380 or 400 nanometres to about 760 or 780 nm).[1] In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.
Five primary properties of light are intensity, frequency or wavelength, polarization, phase and orbital angular momentum.
Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.
Refraction is the bending of light rays when passing from one transparent material to another. It is described by Snell's Law:
n_1\sin\theta_1 = n_2\sin\theta_2\ .
where θ1 is the angle between the ray and the normal in the first medium, θ2 is the angle between the ray and the normal in the second medium, and n1 and n2 are the indices of refraction, n = 1 in a vacuum and n > 1 in a transparent substance.
Interference (wave propagation)
In physics, interference is the addition (superposition) of two or more waves that results in a new wave pattern. Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.
A mirror is an object with at least one reflective surface. The most familiar type of mirror is the plane mirror, which has a flat surface. Curved mirrors are also used, to produce magnified or diminished images or focus light or simply distort the reflected image.
http://library.thinkquest.org/3645/images/Eclipse_header.jpg
A lunar eclipse occurs when the moon passes through the shadow of the earth. A lunar eclipse can last up to an hour and a half. During a lunar eclipse the moon may turn a reddish color. It is not dangerous at all to look at a lunar eclipse because the moon does not make its own light.
Animation by Stephen Gray using photos © James Funkhouser.
http://library.thinkquest.org/3645/images/Solar_Eclipses_Header.jpg
Photograph © James Funkhouser.
A Solar Eclipse occurs when the moon goes in front of the sun and blocks most of the sun's light from the earth. During a total eclipse all you can see from earth is a ring of light around the moon which is part of the sun the moon did not cover. It is dangerous to look at a solar eclipse directly, even if you have sun glasses or smoked glass. It is better to view solar eclipses through a pin hole projector.
A curved mirror is a mirror with a curved reflective surface, which may be either convex (bulging outward) or concave (bulging inward).A convex mirror, fish eye mirror or diverging mirror, is a curved mirror in which the reflective surface bulges toward the light source. Convex mirrors reflect light outwards, therefore they are not used to focus light.
A concave mirror, or converging mirror, has a reflecting surface that bulges inward (away from the incident light). Concave mirrors reflect light inward to one focal point, therefore they are used to focus light.
A real image of an object produces the same pattern of light as the object does somewhere in space. Some portion of the light from the real image reaches our detector along a straight-line path. The detector cannot distinguish between light coming from the object and light coming from the image. We interpret the same patterns in the same way.
A virtual image is the apparent position from which a pattern of light reaches our detector, if we make the assumption that it has traveled from its source to the detector along a straight-line path. Virtual images are formed when light from an object or from an image is reflected or bend on the way to the detector.
Magnetism, a non-contact force, is a category of behavior of materials that respond at an atomic or subatomic level to an applied magnetic field. For example, the most well known form of magnetism is ferromagnetism such that some ferromagnetic materials produce their own persistent magnetic field. However, all materials are influenced to greater or lesser degree by the presence of a magnetic field. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a much more complex relationship with an applied magnetic field. Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, gases, and plastic.
The magnetic state (or phase) of a material depends on temperature (and other variables such as pressure and applied magnetic field) so that a material may exhibit more than one form of magnetism depending on its temperature, etc.
Light is electromagnetic radiation of a wavelength that is visible to the human eye (in a range from about 380 or 400 nanometres to about 760 or 780 nm).[1] In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.
Five primary properties of light are intensity, frequency or wavelength, polarization, phase and orbital angular momentum.
Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.
Refraction is the bending of light rays when passing from one transparent material to another. It is described by Snell's Law:
n_1\sin\theta_1 = n_2\sin\theta_2\ .
where θ1 is the angle between the ray and the normal in the first medium, θ2 is the angle between the ray and the normal in the second medium, and n1 and n2 are the indices of refraction, n = 1 in a vacuum and n > 1 in a transparent substance.
Interference (wave propagation)
In physics, interference is the addition (superposition) of two or more waves that results in a new wave pattern. Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.
A mirror is an object with at least one reflective surface. The most familiar type of mirror is the plane mirror, which has a flat surface. Curved mirrors are also used, to produce magnified or diminished images or focus light or simply distort the reflected image.
http://library.thinkquest.org/3645/images/Eclipse_header.jpg
A lunar eclipse occurs when the moon passes through the shadow of the earth. A lunar eclipse can last up to an hour and a half. During a lunar eclipse the moon may turn a reddish color. It is not dangerous at all to look at a lunar eclipse because the moon does not make its own light.
Animation by Stephen Gray using photos © James Funkhouser.
http://library.thinkquest.org/3645/images/Solar_Eclipses_Header.jpg
Photograph © James Funkhouser.
A Solar Eclipse occurs when the moon goes in front of the sun and blocks most of the sun's light from the earth. During a total eclipse all you can see from earth is a ring of light around the moon which is part of the sun the moon did not cover. It is dangerous to look at a solar eclipse directly, even if you have sun glasses or smoked glass. It is better to view solar eclipses through a pin hole projector.
A curved mirror is a mirror with a curved reflective surface, which may be either convex (bulging outward) or concave (bulging inward).A convex mirror, fish eye mirror or diverging mirror, is a curved mirror in which the reflective surface bulges toward the light source. Convex mirrors reflect light outwards, therefore they are not used to focus light.
A concave mirror, or converging mirror, has a reflecting surface that bulges inward (away from the incident light). Concave mirrors reflect light inward to one focal point, therefore they are used to focus light.
A real image of an object produces the same pattern of light as the object does somewhere in space. Some portion of the light from the real image reaches our detector along a straight-line path. The detector cannot distinguish between light coming from the object and light coming from the image. We interpret the same patterns in the same way.
A virtual image is the apparent position from which a pattern of light reaches our detector, if we make the assumption that it has traveled from its source to the detector along a straight-line path. Virtual images are formed when light from an object or from an image is reflected or bend on the way to the detector.
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