igniting a matchstick using a magnifying glass

athe magnifying glass is able to focus all the light energy to a single point.when the magnifying glass focuses the light rays of the sun at the matchstick,after a certain period of time,the matchstick will ignite.the magnifying glass is also able to burn many other things like paper, leaf,grass and even insects like ants.

1)when two mirrors are placed at a 90 degree angle,there would first be 2 images,one from the first mirror and the second image from the second mirror.the other two images are reflections from the first two images.

2)if the bigger the angle,the lesser images there are.when the angle is 180 degrees which means it is a straight line,there would be only one image.

3)funny images can only be made by a concave or convex mirror.when this two mirrors are made into a single mirror,the combination of this two mirrors would form funny images.thus,when the two mirrors are formed into one,this is the result of you looking long or fat in the mirror.

the invention of airplanes!!!

the airplane is a device that allows people to explore the world through the air.it is a very important military device that attacks gracefully in the sky.it also helps us to escape natural disasters like floods and earthquakes.
the first airplane to fly in the skies was made by the wright brothers.both Wilbur and Orville Wright did not continue their education after thier high school and open up a bicycle repair shop.they used to study the experiments and research taking place in the field of airplane development.their interest and passion for airplanes led to the development of the first heavy-than-air plane.on the 17th december 1903,thy first airplane flew.it was a historic day for earlier efforts to macnufacture the plane was unsuccessful.substantial work in the filed of airplane development took palce in the 19th century.However,there was a lot of interestamong people regarding airplane from the times of leonardo da vinci.before the fundementals ofaerodynamic was discovered,airplane enthusiasts followed the ornithopter tradition.it is the machine which uses the mechanism of flapping of the wings of birds.
today airplanes have become technologically advanced.today airplane can carry more than 800 people at a speed of 900 km/hrs.the credit off course goes to the maverick,the wright brothers.the incredible journey of airplane development pays a tribute to the great confucious who rightly said,"a journey of a thousand miles,begins with a single step."