Science's greatest leaps forward have come through inventions and discoveries that transformed human understanding and everyday life. The invention of the microscope opened up the microbial world; the discovery of electricity powered modern civilisation; and the development of va Read more
Which metal is used in the filament of a light bulb?
EasyTungsten is the metal used for the filament in traditional incandescent light bulbs. It is chosen because it has the highest melting point of all elements 3,422^circC, allowing it to glow white-hot without melting.
The symbol for Tungsten on the periodic table is 'W', which stands for "Wolfram," its original German name!
Who invented the light bulb?
EasyThomas Edison is widely credited with inventing the first commercially practical incandescent light bulb in 1879. However, Edison's true genius lay in developing the complete electrical distribution system, including generators, wiring, and sockets, that made electric lighting practical for homes and businesses. His bulb with a carbon filament could burn for over 1,200 hours.
Contrary to popular belief, Thomas Edison did not "invent" the light bulb—he created the first commercially practical version. British inventor Humphry Davy demonstrated the first electric light in 1802, and at least 20 other inventors had created working bulbs before Edison.
Who discovered gravity?
EasySir Isaac Newton is the scientist famously credited with discovering the law of universal gravitation in the late 17th century. According to the story, he was inspired after watching an apple fall from a tree, which led him to realize that the same force pulled the moon toward the Earth. He published these ideas in his groundbreaking work, 'Philosophi? Naturalis Principia Mathematica'.
Newton was also a master of the Royal Mint and spent much of his later life hunting down counterfeiters!
Who invented the telephone?
EasyAlexander Graham Bell is the inventor most famously credited with patenting the first practical telephone in 1876. His work focused on transmitting sound over a wire, which revolutionized global communication. His first successful words on the device were, 'Mr. Watson, come here, I want to see you.'
Interestingly, Bell actually refused to have a telephone in his own study because he found it too distracting for his work!
Who invented telephone?
MediumAlexander Graham Bell is widely credited with inventing the first practical telephone, receiving the first US patent for the device in 1876. His invention revolutionized global communication by allowing the human voice to be transmitted as electrical signals over wires. Interestingly, Bell's mother and wife were both deaf, which profoundly influenced his life's work in acoustics and speech.
Bell's first successful telephone call was to his assistant in the next room, where he said the famous words: "Mr. Watson, come here, I want to see you." Ironically, Bell considered the telephone a distraction and refused to have one in his personal study.
Who discovered the Electron?
MediumThe electron was discovered by the British physicist J.J. Thomson in 1897 through his experiments with cathode ray tubes. He showed that cathode rays were composed of previously unknown negatively charged particles, which he initially called "corpuscles."
Thomson won the Nobel Prize for proving electrons are particles, while his son, George Paget Thomson, later won the Nobel Prize for proving electrons act like waves!
Who discovered the law of the pendulum?
HardGalileo Galilei discovered the law of the pendulum in 1583 while watching a chandelier swing in the Cathedral of Pisa. He noticed that the time it took for a pendulum to complete one full swing (its period) depended only on the length of the string, not on the weight of the object or the width of the swing. This discovery eventually led to the development of accurate pendulum clocks.
Legend says Galileo used his own pulse to time the swings of the chandelier because stopwatches hadn't been invented yet!
Who discovered penicillin?
HardAlexander Fleming, a Scottish physician and microbiologist, discovered penicillin in 1928. This was the world's first true "miracle drug" and marked the beginning of the era of antibiotics. Fleming noticed that a mold called Penicillium notatum had accidentally contaminated a petri dish of bacteria and was killing it. His discovery eventually led to treatments for previously deadly infections like pneumonia, meningitis, and syphilis.
Fleming's discovery was a complete accident-he had left a messy lab before going on vacation and only noticed the mold when he returned! He later joked, "One sometimes finds what one is not looking for."
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