The wavelength corresponding to maximum energy for hydrogen is 91.2 nm the corresponding wavelength for he+ ions is
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Nowadays, the communication between various people in our world is unlimited. There are many modern technologies that make us more comfortable. Mobile phone is the one of those technologies which some people think that it is very necessary and all people can’t live without it. In fact, Mobile phone is very harmful and it has several bad points if we cannot avoid it. As the result, our lives without using mobile phones will be better. This essay will consider arguments for having mobile phones and lead to some main bad effects if we still use it.
As you can see in several advertisements, there are many agencies that try to promote their mobile phones to us. Those products are interesting and can load customers to buy them easily. They will present about new applications, programs, and styles that can persuade us. In contrast, mobile phones with many applications will be expensive. Phone producers will change their phone style a little and promote them again. When we see them, we will think that they are new and we will buy them. Especially, most teenagers will use mobile phones largely. They often change their phones for up-to-dating although they receive all money from their parents. It is a main problem that will make them wasteful. Moreover, the price of downloading various applications is more expensive. Modern phones can upload several programs such as songs, games, themes, videos, etc. All functions are very expensive for example, downloading a song, we must spend at least 35 baht. Also, the charge of calling is expensive, too. Although, there are various promotions, each one will take our money much. Therefore, mobile phone likes electronic materials that hold our money.
Mobile phones make our lives comfortable and easy to communicate with other people. However, it is a cause of diseases that can make us unhealthy. Dr. Sakka Natakuathung has reported that if we using phone for a long time, we will have a headache and Alzheimer's disease. There is microwave which is used for receiving and sending mobile phone signal. If we receive it a lot, it is very dangerous. Furthermore, using mobile phones for a long time is a cause of earache. We have to hear loud noise during we talk on phone and we will be disturbed. Too, according to Swedish research which is published on International Archives of Occupational and Environmental Health Journal, people who use mobile phone about an hour per day in ten years will be brain tumor. Besides, there is an American researcher, Dr. George Carlo, he states that using mobile phone is a cause of cancers. They are violent diseases that are difficult to treat. So, if we can stop using mobile phones, our lives will be healthy.
In conclusion, each technology has some effects for users. Living with mobile phones does not bring the happiness to us. There are many disadvantages if we use them. Intelligent customers have to be careful and consider how to buy a good thing. Mobile phone is not necessary in our lives. Our lives would be better if we don’t use mobile phones.