Can't use mobile phone in thunderstorm day?

"Physical knowledge" in the face of the roar of Thunder, the media will often give a thunderstorm day to prevent Lightning "guide", "Tips," Memo ", one of the common one is: when the rain and thunder must not use the phone to answer the phone, preferably close the phone, in order to prove this point, but also listed a series of use of mobile phones when lightning hit the case.　　But does the phone really attract thunder?　　Mobile phone also known as radio, and thunder and lightning have a word, people do not worry about their two will "have a grocer", the mobile phone has a variety of electronic components, including the antenna can accept radio waves, they are metal conductors, Uncle Thunder will let them go? These electronic components are very small, the phone's circuit relies on a battery to drive, receiving a weak radio waves, and then the circuit produces a relatively small current to work. The intensity of radio waves used by mobile phones is only a few one out of 10,000 of the intensity of the lightning field.　　In addition, the hands of a few centimeters long cell phone will not allow users to increase the height, like lightning rods to attract thunder and increased the risk of lightning. Some people think that the mobile phone will actively "seduce" the Thunder and lightning, the reason is that mobile phone use of electromagnetic waves will allow the air ionization, increase the electrical conductivity of the air. In fact, this does not happen, as has been said, the mobile phone's radio energy is too low, its electromagnetic wave band does not have the ability to affect the air conductivity. Generally speaking, the higher the frequency of electromagnetic waves, the stronger the ionization effect. High frequency cosmic rays have a strong ionization effect on the air, and the sun's ultraviolet rays make the air ionized to produce ozone. Visible light that is slightly lower than the UV frequency is not. Mobile radio frequencies are lower.　　In terms of ionizing air, it's just a soy sauce. To prove that there is no relationship between using a mobile phone and being struck by lightning, in addition to the physical principles behind the search, you can also make numbers speak, and sufficient statistics can be convincing. If we want to look at this issue comprehensively, should consider four of the same number of tongue twisters: 1, how many people use mobile phones when the Thunder, was struck by lightning, 2, how many people did not use the mobile phone when thunder, but was struck by lightning, 3, how many people use mobile phone when thunder, but not by lightning hit;　　How many people did not use the mobile phone when the Thunder, also did not hit by the Thunder ... Many people believe that "mobile phone fuze" often only pay attention to the first number, and ignore the latter three digits. The example of a few victims who were struck by lightning when using their mobile phones, no matter how vivid and exciting they were, could not fully prove that there was a rope connected between using the phone and being struck by lightning.　　These few examples are more evidence of the popularity of modern mobile phones than they can lead to.　　In the United States, in the face of media reports of "close contact between mobile phones and thunder and lightning", experts from the National Oceanic and Atmospheric Administration have openly said that mobile phones and small metal objects will not attract thunder and lightning, and people were hit by lightning when they were at the wrong time.But that's not the case with the phone's brother, the landline. Answering a landline when it thunders does increase the risk of lightning. The phone line connects the outside with the interior, and outdoor objects are more likely to be hit than indoors.　　If the telecommunications equipment or surrounding objects are struck by lightning, it is true that the users of the telephone may be compromised.　　In this way, in the Thunder and lightning Weather, the use of mobile phone calls without using a landline is an excellent security option. -Choshumi (City University of Hong Kong)