Thursday, July 7, 2011


Interesting videos on Microwaves:

Ostrich egg in microwave over (Brainiac)

Cell Phones cook popcorn



Eggs explode when put into the microwave due to the fact that the yolk’s sack is virtually indestructible. Thus, when heat is applied, the yolk expands till it reaches it’s maximum pre

ssure point and it will then burst.


Microwaves can be useful in many ways. Some of the most outstanding ways where microwaves are used is for communication (phone), radar, radio astronomy, navigation and for cooking.

Microwave Ovens :

A microwave oven uses microwaves to heat food. Microwaves are electromagnetic waves. In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). The waves in this frequency are absorbed by water, fats and sugars. When they are absorbed they are converted directly into atomic motion, heat. They are not absorbed by most plastics, glass or ceramics. Metal reflects microwaves, which is why metal pans do not work well in a microwave oven.


Prolonged exposure to microwaves is known to cause harmful effects to the body. Cataract (clouding of eye lens) is common due to the radiation from the microwaves. Recent research indicates that microwaves from mobile phones can affect parts of your brain and you would be more vulnerable if you're young and your brain is still growing.
So the advice is to keep calls short and never stand close to the microwave oven when it’s turned on.


8:55 AM

Done By : Johanan Teo, Hardy Shien, Chan Jun Wei