Radiation from cell phones

Published on January 2017 | Categories: Documents | Downloads: 19 | Comments: 0 | Views: 510
of 9
Download PDF   Embed   Report

Comments

Content

Do cell phones have enough radiation to increase water temperature? This science fair project was conducted to wto increase the temperature of water in a small plastic cup. The tests were done using various cell phones Apple iPhone, Motorola Droid 2, Samsung Fascinate.

Hypothesis

Cell phone radiation does not contain enough energy to increase the temperature of water in a plastic cup.

Overview

Cell phone radiation
The number of cell phone users around the world has increased at an enormous rate since the introduction of the cell phone by Dr. Martin Cooper in the 1973. There are more than 4.6 billion cell phone users around the world (as of the end of 2009). However, a lot of concern has been raised regarding the amount of radiation emitted by cell phones and the short and longterm effects of cell phone radiation on the health of the cell phone user. Radiation emitted by cell phones exists in the form of electromagnetic waves. These are radio waves that fall within the range of microwave signals. Microwave radiation can cause dielectric heating of dielectric material, which includes human tissue. Therefore, it is theoretically possible for radiation from cell phones to increase the temperature of the cells on the surface of our head, when we use cell phones. This increase in tissue temperature is however, very minimal and should be able to be regulated by blood flow. The tissue on the surface of our head will absorb some of these radio signals. Since the maximum power that a cell phone can generate is well below 4 watts, the radio signals might make our skin slightly warmer but they should not cause any tissue damage.

Scientific Terms

Electromagnetic Radiation radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge. Microwave Signals microwave signals are similar to radio broadcasting signals, with the primary difference being that radio waves are longer than a meter. This means that microwave signals are higher frequency than radio signals. Dielectric Heating heating of an insulator by a high-frequency electric field. Radio Wave a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.

Materials
The materials required for the science fair project:

A Motorola Droid 2 A SamsungFascinate AApple iPhone Small Plastic Cup 30 ml of water or 2 teaspoons A Small Measuring Cup Thermometers A Stopwatch

Procedure

1. For this science fair project, the independent variable is the brand and model of the cell phones used for this experiment. The dependent variable is the temperature of the water in the cup. This is determined by using a thermometer to measure the water temperature. The constants (control variables) are the amount of water in the cup, the length of time the cell phone rings, and the room temperature. 2. The experiment is carried out with 3 brands of cell phones manufactured by Samsung, LG and Apple. One cell phone (any model) from each manufacturer will be tested. 3. A Glass of water is filled with 30ml of water and a thermometer is placed inside the cup. The initial temperature of the water is measured and recorded in the table below. 4. The cell phone to be tested is placed on the table and the cup of water is brought as close as possible to the cell phone. The cell phone s number is dialed from another phone and the cell phone is left to ring continuously for 30 seconds. After 30 seconds, the temperature of the water is measured and recorded in the table given below. 5. Procedures 3 and 4 are repeated using cell phones from the other 2 manufacturers. The water temperatures are measured and recorded in the table and graph.

Observation

It is observed that the temperature of the water in the cupdid not increase after the cell phone from the 3 manufacturers was left ringing for 30 seconds.

Condition Type of Phone Before ringing After ringing

Effect of cell phone radiation on water temperature (degrees Celsius) iPhone 32.3 32.3 Droid 2 32.1 32.1 Fascinate 32.6 32.6

Conclusion

The hypothesis that radiation emitted by a cell phone emits enough energy to increase the temperature of water in a cup is proven to be incorrect. Many studies have been done to determine if radiation from a cell phone can cause health problems. Most of the studies completed were able to show that using the cell phone does not cause cancer or other health problems. However, it is still advisable to minimize exposure to cell phone radiation by using hands free devices, earphones or Bluetooth devices.

References

http://reviews.cnet.com/cell-phone-radiation-levels/ http://news.cnet.com/8301-17938_105-20024506-1.html http://www.howstuffworks.com/cell-phone-radiation.htm http://www.radiationtalk.com/ http://www.cancer.gov/cancertopics/factsheet/Risk/cellphones

Sponsor Documents

Or use your account on DocShare.tips

Hide

Forgot your password?

Or register your new account on DocShare.tips

Hide

Lost your password? Please enter your email address. You will receive a link to create a new password.

Back to log-in

Close