Y shouldn't I use cellphone in hospital

Last time I went to a hospital (couple of years back) I was told to switch off my cell phone in some areas. At that time I thought that it was because that it would disturb the patients. Today after almost two years I came to know the correct reason behind this. You know what, I was stupid enough not to relate it with not using cellphones in the airplanes.
The thing is, the electromagnetic interference cause the electric equipments in the hospital to behave bizarrely. As one of the example on CNN was that a mechanical breathing(ventilator) machine went on/off on its own when a cell phone was brought near it. Now just imagine yourself hooked to that ventilator machine and breathing through it, and your sweet heart talking on a cell phone with her friend or somebody which may cause the ventilator to turn on/off, guess what your sweetheart would no more be sweet any more as you heart is in trouble now.
There are many other examples derived from tests conducted on this matter , I wrote the above stuff after reading an article on CNN (please refer to the "no cell phone zone " section) . All credit goes to the author of the article.
So please be considerate and obey the signs, as it can be injurious to somebody's health.

How does a Microwave work?

Well this might sound very basic but I just came to know how does a microwave works. I know that there were microwave involved but didn't knew it completely. But here is what I came to know. I got it from this link .

Microwaves are a form of electromagnetic energy , like light wave or radio wave and occupy a part of the electromagnetic spectrum. Microwaves cause food molecules to vibrate rapidly, creating friction that produces heat which then cooks the food. In other words, food cooked in a microwave simply absorbs microwave and turns their energy into thermal energy, which cooks the food. Microwaves are colorless, odorless, tasteless, and these are not radioactive. Microwave oven is one of the most energy efficient appliances money can buy today. For example, it takes 18 times the electricity to bake a potato in a regular oven than in a microwave. Microwaves cook from the outside towards the center of the food. Microwave ovens are faster for most cooking jobs because the energy heats the food and not the oven or the containers. They don't also heat up the kitchen, especially in the summer time like the other cooking appliances. All credit goes to the author of the article here