C3- Use of electromagnetic waves in communication

the application of radio wave

Television, mobile communication and bluetooth and wifi

Hazards of x rays

X-rays damage cells, causing mutations (which may lead to cancer) and cell death

ADVANTAGES of infrared

Advantages 1. Infrared rays are used in medical treatments. 2. infrared Are used in cameras for night vision.

Application of visible light

Allows us to communicate with one another through books, hand signals and video The use of visible light needs the transmitter and receiver to be in the line of sight. But it is more secure against eavesdroppers than radio waves.

ADVANTAGES of radio waves in communication

An advantage of radio waves is that They can travel long distances carrying message.

An advantage of wireless communications over wired communications is:

An advantage of wireless communications over wired communications is wireless devices can be portable.

the application of microwaves

Applications 1. Radar 2. Telemetry 3. Microwave ovens 4. wifi

The equation of the inverse squared law

I=K/R^2

ADVANTAGES of microwaves

Advantages Microwave energy can penetrate through light rain, snow, clouds and smoke

DISADVANTAGES OF INFRARED

Disadvantages Can damage human cell tissue.

Which electromagnetic radiation has the highest frequency?

Gamma radiation

The inverse square law

If the distance is doubled, the intensity is reduced by four times (two squared). If the intensity is trebled, the intensity is reduced by nine times (three squared)

What is a spectrum

light waves are refracted as they enter and leave the prism. The shorter the wavelength of the light, the more it is refracted. As a result, red light is refracted the least and violet light is refracted the most, causing the coloured light to spread out to form a spectrum.

DISADVANTAGES of radio waves in communication

A disadvantage for radio waves is that it has low frequency so it can't transmit (send) a lot of data at one time.

The electromagnetic radiation in order from lowest to highest

- Radio waves - Microwaves - In-fared Radiation - Visible Light - Ultraviolet Radiation - X-Rays - Gamma Rays

what types of waves can be used for communication

- Radio waves - microwaves - visible light - infrared can all be used for communication.

DISADVANTAGE of microwaves

Line-of-sight will be disrupted if any obstacles, such as new buildings, are in the way. Signal absorption by the atmosphere. Microwaves suffer from attenuation due to atmospheric conditions.

microwaves

Microwave radiation can be used to transmit signals such as those for mobile phone calls. Microwave transmitters and receivers on buildings and masts communicate with the mobile phones in their range.

Radio waves uses in communication

Radio waves have the longest wavelengths and lowest frequencies in the electromagnetic spectrum. Like all the other electromagnetic radiations radio waves travel at the speed of light in a vacuum

AN ACRONYM TO HELP YOU FOR THE ELECTROMAGNETIC SPECTRUM

Richard Married Ians very ugly x girlfriend

ADVANTAGES of visible light

The main advantage of visible light is that you can see it. Visible light is not harmful to our eyes.

what is the electromagnetic spectrum

There are various types of electromagnetic radiation with longer wavelengths of light than red light and with shorter wavelengths than violet light. All the different types of electromagnetic waves travel at the same speed through space.

Mircowaves uses in communication

These waves are commonly produced by electromagnetic oscillators with high frequency in electric circuits. Microwaves are good for transmitting information from one place to another place

Application of infrared

They are used in: security lights burglar alarms Infrared radiation is also used to transmit information from place to place, including: remote controls for television sets and DVD player data links over short distances between computers or mobile phones and in optical fibre communications.

DISADVANTAGES of visible light

Very bright light can damage our eyes - you should never look directly into the Sun.

Visible light uses in communication

Visible light is the only part of the electromagnetic spectrum which is visible to the human eye. Visible light can be seen in the form of different colors, each color has a different wavelength

Infared signals in communication

We cannot see infrared radiation, but we can feel it as heat energy. High intensity infrared is used in heaters, toasters and grills, and it can cause burns. Infrared sensors can detect heat from the body.Infrared radiation is also used to transmit information from place to place,

Hazards of Gamma rays

gamma rays also damage cells, causing mutations (which may lead to cancer) and cell death

Hazards of infrared radiation

infrared radiation is felt as heat and causes skin burns

Hazards of microwaves

microwaves cause internal heating of body tissues

Which electromagnetic radiation has the longest wavelength?

radiowaves

Which type of electromagnetic radiation travels at the greatest speed in a vacuum?

they travel at the same speed

all types of electromagnetic radiation are

transverse waves they travel all at the same speed in a vacuum- empty space