Essay PreviewMore ↓
The electromagnetic spectrum is the entire range of radiant energies
or wave frequencies.
There are seven main regions in the electromagnetic spectrum. These
are: radio waves, microwaves, infrared, visible light, ultraviolet,
x-rays and gamma rays. Each section of the EM spectrum has a different
wavelength, these are shown in the table below
Section of EM spectrum
Wavelength (in cm)
10 à 10
10 à 10
10 à 10
10 à 10
Each region of the EM spectrum has different uses in everyday life.
These are used for transmitting radio signals, phone signals and
television. Also stars and gases in space emit radio waves.
These are used for cooking, in our microwaves. They can also be used
This is used for heating, night vision and in remote controls.
This is the light that we see. It is emitted by everything.
Is emitted from the sun, it is what tans our skin. It is also used for
sterilising, and in forensic science, to see things such as traces of
bodily fluids, which are invisible to the naked eye.
These are used for medical purposes in hospitals, to look at our
These are emitted by radioactive substances, and are also used for
killing some cancer cells.
Each regions wavelength also relates to what it is used for. For
example, radio waves are used for transmitting radio signals because
they have a long wavelength, and can therefore travel further without
being disrupted. Also the reason we can see visible light is because
How to Cite this Page
"The Electromagnetic Spectrum." 123HelpMe.com. 11 Dec 2019
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- PART 1 The Electromagnetic Spectrum is the range of frequencies of possible electromagnetic radiation. The Spectrum ranges from 0 Hertz up to 2.4x1023 Hertz. The exact wavelength limits of the Spectrum are unknown however it is widely believed that the short wavelength limit is equal to the Planck Length (1.616x10-35m) and the long wavelength limit is the length of the Universe. Electromagnetic radiation (EMR) is an occurrence that takes the form of self-propagating waves produced by the motion of electrically charged particles, which can move through matter or a vacuum.... [tags: Physics]
2038 words (5.8 pages)
- Electromagnetic Spectrum for the Middle School Student Waves are all around us and come in various forms. Sound waves can travel through air because air is made of molecules, which carry the sound. Another type of wave is electromagnetic waves, which are different than sound waves because they don’t need molecules to travel. This means that electromagnetic waves can travel through air and solid materials as well as empty space (Groleau 2011). The electromagnetic spectrum consists of all waves of energy found in our universe.... [tags: Physics ]
1122 words (3.2 pages)
- The Electromagnetic Spectrum The electromagnetic spectrum is the collective name for all types of radiation. Radiation is energy that travels around in waves. The electromagnetic spectrum goes from the waves with the lowest energy to those with the highest energy. Radio Waves [IMAGE] Radio waves have the longest wavelengths in the electromagnetic spectrum. They can be from as long as a football to as long as a football pitches. Radio waves carry signals from devices from one place to another invisibly through the air.... [tags: Papers]
1899 words (5.4 pages)
- The Electromagnetic Spectrum [IMAGE] The electromagnetic spectrum is the entire range of radiant energies or wave frequencies. There are seven main regions in the electromagnetic spectrum. These are: radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays. Each section of the EM spectrum has a different wavelength, these are shown in the table below Section of EM spectrum Wavelength (in cm) radio waves > 10 microwaves 10 à 10 infrared 10 à 10 Visible light 10 à10 ultraviolet 10 à 10 x-rays 10 à 10 Gamma rays <10 Each region of the EM spectrum has differ... [tags: Papers]
1072 words (3.1 pages)
- The electromagnetic spectrum is made up of six different types of waves. Radio waves, Microwaves, Infrared waves, Visible light, Ultraviolet light, X-rays and Gamma rays. The radio waves are used to transmit radio and television signals. The infrared waves are used to tell temperature of areas. Visible light is all the colors that we can see. Ultraviolet light can help things grow but to much can cause diseases such as skin cancer. X-rays are used as a tool to find broken bones or take pitchers of our sun.... [tags: essays research papers fc]
2181 words (6.2 pages)
- Electromagnetic Waves essay Radiation is the emission of energy as electromagnetic waves or as moving subatomic particles; an example of radiation is, electromagnetic radiation.This is a form of radiant energy which travels through space via electromagnetic waves. These waves can be found in the electromagnetic spectrum. This is the range of all possible frequencies of electromagnetic radiation.The range of waves in the electromagnetic spectrum range from radio waves, to gamma rays, the waves in the middle consists of infrared, visible, and ultraviolet waves.... [tags: electromagnetic, spectrum, vitamin d]
960 words (2.7 pages)
- In my spectrum of spinach absorbance graph, the greatest peaks were at 435 nm, 465 nm, and a smaller peak at 670 nm. These values correspond to the approximate values of visible light wavelengths as indigo (445 nm), blue (475 nm) and red (650 nm), respectively. This indicates that the spinach extract is the most absorbent of these colours and frequencies. The lowest absorbances were between 500 nm - 630 nm , which covers green (510 nm), yellow (570 nm), and orange (590 nm) light . Green is a color that is reflected, and not absorbed by the spinach and this is indicative of the green colour that it appears as.... [tags: Light, Color, Electromagnetic radiation]
771 words (2.2 pages)
- A cell phone is a portable telephone which uses cellular network to receive and make calls and send and receive text messages. Cell phones emit signals via radio waves which are comprised of radio frequency energy; it is a form of electromagnetic radiation. Electromagnetic radiation is energy letting out waves like behaviour as it is travelling through space. Examples of electromagnetic radiation are microwaves, x-rays and visible light. The electromagnetic spectrum consists most of the colours we world normally see in a rainbow colours like red, orange, green, yellow, blue, indigo and violet.... [tags: cell phones, effects]
560 words (1.6 pages)
- Nearly all energy in one form or another can be traced back to solar energy, and it is harness in many different ways. Solar cells are the most direct way to convert incident solar radiation into electricity, this process is also known as photovoltaics. Solar cells produce no pollution, noise, and do not contain any moving parts, allowing them to be tough, reliable, and long lasting. The natural light that we enjoy from the sun and see every day is only a fraction of the total energy emitted by the sun incident on the earth.... [tags: solar, energy, cells, electricty]
1676 words (4.8 pages)
- A cell phone is a cellular device that can receive and make calls through radio link while being in any part of the world, as long as there is cellular network. • EME is electromagnetic energy also known as electromagnetic radiation (EMR) that we are surrounded by every day, emitted from natural sources like the sun, earth and the ionosphere. It is also emitted from unnatural sources like mobile phone base stations, broadcast towers, radar equipment, remote controls, electrical and electronic equipment.... [tags: broadcast towers, remote controls, cancer]
2104 words (6 pages)
radio waves have a long wavelength and low energy, this makes them
safe for us to use in the way we do, however gamma rays have a short
wavelength and high energy, this is what makes them very dangerous.
There are eight different types of energy. These are;
This is energy due to position. Potential energy can be found in all
labs and work places. For example, beakers on a desk have potential
energy, books on shelves have it, and people sitting on chairs also
have potential energy.
This is energy due to motion, and can be found in many work places.
Something that is falling has kinetic energy.
This is the energy associated with moving electrical charge and can
also be found in many work places. For example, the energy that comes
from a power socket is electrical energy.
This is the energy of electromagnetic waves
This is the energy that is emitted from the sun
This is the energy released by chemical reactions. This form of energy
can be found in a chemistry laboratory
This energy is associated with particles of atoms.
This is sometimes called heat energy and can be found in many work
places and labs. For example, a water bath in a lab will emit heat
energy when in use, as will a light bulb in an office.
Different pieces of equipment will use different amounts of energy.
For example, a light bulb consumes 75 watts of power, a desk top
computer and 15’’ monitor consumes 150 watts, a water heater consumes
3800 watts and a power station consumes 500 megawatts of power.
Energy inputs, outputs and efficiencies
A coal fired power station burns coal at a rate of 75kg of coal per
Each kg of coal releases 27 million joules of energy
Total input for power station:
Power= work done/ time
Power= 2025 mj/s
So the power station produces 2025 million joules of energy per
Output= 800 mw
Efficiency= 800/ 2025 x 100
A water bath in a lab has a power rating of 2.5 kW. It was used to
heat tap water at 17°c to a temperature of 37°c for a biology
experiment on enzymes. It took 22mins and 45 secs before the water
reached the right temperature. The bath contained 30 litres of water
The specific heat capacity of water is 4.2 J kg-1K-1
Total energy used by heating element during the heating period.
Power= 2.5 kW
Time= 22 mins and 45 secs= 1365 seconds
Total energy used (energy output) = 1365x 2.5
= 3412.5 joules
Useful energy absorbed by water
Mass of substance= 30 litres
Specific heat capacity= 4.2 J kg-1 K-1
Temperature rise= 20°c
Energy absorbed= 30x4.2x20
= 2520 Jkg-1K-1
Efficiency= 3412.5/2520 x 100
= 73.8 %
1. Electric fire
Electrical energy à heat energy, light energy + sound energy
2. A car
Potential energy (petrol) à kinetic energy, sound energy, + heat
The electric fire is more efficient because the heat energy that it
emits is useful. Whereas in most other energy conversions, such as the
car, heat energy is actually a waste product and is not used.
The microscope is designed to magnify an object/specimen that is
placed onto the stage.
A mirror at the bottom of the microscope projects the light through a
hole in the stage and through the object. The objective lens picks up
this light and magnifies it. The light then continues through the tube
to the eye piece, which magnifies the image more before we see it.
Most microscopes have more than one objective lens, and these can be
changed to increase or decrease the magnification. The objective lens
can also be moved closer, or further away from the object to focus it.
This is done using the course focus knob. The fine focus knob can also
be used to focus the image further. The stage is used to place the
object on, and the stage clips to keep the object in place and top it
PH meters are designed to tell you the pH of a solution quickly and
efficiently. They consist of three main parts; the sensing electrode,
the referencing electrode and the electronics of the meter
The special glass on the end of the sensing electrode senses H+ ions
and a millivoltage is generated. The solution in the bottom of the pH
meter that touches the special glass picks up this signal, a pure
silver wire dipped in silver chloride passes this signal from the
solution to the electrodes cable/connector.
The filling solution in the reference electrode has oH- ions in it.
This generates a millivoltage which is passed on in the same way as in
the sensing electrode.
The millivoltages are then passed on into the electronic part of the
pH meter. The pH meter then takes the inputs from the sensing
electrode and the referencing electrode and compares the two values to
get a result millivolt reading. The reading in mV is then converted
into a pH reading.
In modern pH meters both the sensing electrode and the referencing
electrode are contained in one glass tube, with the special glass of
the sensing electrode protruding from the bottom.
The light microscope
The purpose of the light microscope is to magnify images. Many factors
would have had to be considered when designing this equipment. For
example, where the object/specimen would be placed, how the image
would be magnified, how we would be able to see the image. These
factors are solved by the stage, lenses , eyepiece and built in light
sources. Other factors would include, where the microscope would be
used, for example, in a teaching lab. This is taken into account by
the size of the microscope. It is small enough to sit on the bench of
a teaching lab, and relatively inexpensive compared to other
microscopes, therefore teaching institutions can afford to purchase
more than one for their students.