Anticlockwise Clock
 Pix-Ray Graph
 Doorbell
 Engineer With Sweet Tooth Discovers Instant Cooking!
 Recycling Aluminium
 How do Fans Work?
 Getting Sauce out of the Bottle
 Narrowing Stream
 Blowing Out
 Ice is Lighter
 S.N. Bose
 Fruits and Noughts
 Archimedes' War machines
 Quicksand
 The Farthest Man-Made Object
 Panama’s Great Waterway
 What is a Whiplash Injury?
 What are Tektites?
 Einstein and Light
 Light and Life
 The International Year of Light
 What is Ebola?
 Airborne!
 Chasing a Comet
 The Conquest Of Polio
 Bombay Blood group
 Thumba in Kerala
 Science Notes
 Archimedes Screw Pump
 Acid Rain
 Rising Water
 What's pushing it up?
 Space Exploration - 35
 Space Exploration - 34
 Heavy Finger
 Space Exploration - 33
 Space Exploration - 32
 The Flame Stays Down
 Space Exploration - 31
 Space Exploration - 30
 Candle in the Wind
 Space Exploration - 29
 Space Exploration - 28
 Air Pressure
 Space Exploration - 27
 Space Exploration - 26
 Space Exploration - 25
 Space Exploration - 24
 Space Exploration - 23
 Space Exploration - 22
 Space Exploration - 21
 Space Exploration - 20
 Space Exploration - 19
 Bubbling Egg
 Space Exploration - 18
 Marbles in Glass
 Experiment Wth A Potato
 Worm Light, Glows Bright!
 Plastic in, not out!
 Car like you!
 Tenant Happy, Landlord Happy!
  The Rusting Nail
 Make Silk Gandhi’s Way!
 The Friendly Paper Producer!
 Doctor Potato!
 Sweet Power!
 No Hope For Dope!
 Kill A Bug With A Bug!
 Plant A Tree, Run Machines !
 Leaping Grains
 The Punch Back Plant Pack!
 The Knowall Atlas
 Futuristic Plastic
 Bloodsuckers Doom
 Sleeping enough?
 Space Exploration - 17
 Space Exploration - 16
 Space Exploration- 15
 Space Exploration - 14
 Space Exploration - 13
 Space Exploration - 12
 Space Exploration - 11
 Space Exploration - 10
 Space Exploration - 9
 Space Exploration – 8
 Space Exploration—7
 Space Exploration — 6
 Space Exploration - 5
 Space Exploration - 4
 Space Exploration- 3
 Liver Spots
 Space Exploration - 2
 Inflating Balloon
 Space Exploration: 1
 Lactose-Intolerancy
 Vast Universe
 Death of a Star
 What Is A Heart Attack?
 Extra Solar Planet
 Forrest Bird’s Respirator
 How we cry
 Heat Resistant Balloon
 Chewing Gum
 Space Wanderers
 Is There a Truth Drug?
 Mission Mars
 Mysterious Planet
 What is Dialysis?
 Reducing Pressure
 Big Moon
 What is Angioplasty?
 Scientists Need Your Help!
 Ice Melts Under Pressure
 The Floating Balloon
 Sir Isaac Newton
 Cauliflower ear
 Zeolites
 Windshield wiper
 Memory
 Dancing Coin
 The rainbow formation
 White Dwarfs
 Galileo’s final mission
 Band aid
 Elastin
 Hippocrates
 Coin Reappears
 Io – Jupiters volcanic moon
 CAT scans – good or evil ?
 Bar code
 Its melanin again!
 Joseph Lister
 Spinning Spiral
 A drug reborn
 Hot air balloons
 Rene Theophile Hyacinthe Laennec
 How a tendon got its name
 Measuring Heat
 The Eye of Heaven
 Cure for The Common Cold?
 The First Steam Engine
 Freeze Drying
 Samuel Morse
 Life on Earth and beyond
 Sticky business
 Johannes Kepler
 Sunspots
 The laughter workout
 Scuba
 The Great Bear
 Carl Linnaeus
 Safety pin
 Mars-Once Again!
 Sun and Skin
 The 3D Effect
 Surface Tension
 Poison Dart Frog
 Artificial satellites
 Food Preservation
 Computer viruses
 Robert Hooke
 Heavyweight Paper
 Spacesuit
 Gene Therapy
 The yawn yarn
 Indian Dinosaur discovered
 Niels Bohr
 Fountain pen
 Tell Tails
 Throwing out Water
 Candle In The Bottle
 Sparks of genius
 Charles Darwin
 Sweat it out!
 Drifting Matchsticks
 Air Power
 Funnel Problem
 Something In The Glass
 Hard Straw
 Cure for Malaria
 Animalcules Discovered
 Penicillin Discovered
 Insulin Isolated
 Changing Buoyancy
 The Moons of Mars
 The Riddle of Tunguska
 Life on Europa?
 What is a Fireball?
 The Big Bang Theory
 ECG
 Spin Drier
 Super Glue
 Michael Faraday
 Charles Goodyear
 Eccelenza Fermi
 Thomas Alva Edison
 Doing Without Sleep
 The Phantom Limb
 Athlete's Foot
 Liver
 Spleen
 Heart
 Saliva
 Stephen Hawking
 SARS Under Control
 Mission on Mars
 Motion Camouflage
 Heart Transplant
 Hair Driers
 Microwave Oven
 Shrinking Balloon
 The Wonder Drug
 Galle's Luck
 Heavenly Stone
 By Jove! It's Galileo Again!
 Ida's Moon
 Bee Sting Therapy
 The Pearly Spot
 Archimedes
 Louis Pasteur
 Hypothalamus
 Alfred Nobel
Einstein and Light

There is a galaxy of great minds associated with the study of Light. They include luminaries from Greece and other parts of Europe, Arabia, Egypt and India. Standing head and shoulders above the rest is Albert Einstein who was awarded the Nobel Prize in Physics in 1921 for his explanation of the Photoelectric Effect.

Albert Einstein was born on 14 March, 1879 in Ulm, Germany. His father made a living as a featherbed salesman. Albert was slow to develop speech and did not utter his first word until the age of three.

A Poor Student
The rote learning at school bored him. He got low grades and would often get into trouble with his teachers, who were strict disciplinarians. Once, his seventh grade teacher got so frustrated with him that she told him that he ‘would never get anywhere in life’.
Einstein hated school. He tried to get out of his last year of high school by taking an entrance examination to join the famous Swiss Polytechnic University in Zurich. He failed. After a year at a boarding school, he finally succeeded in gaining admission at the university. Einstein graduated in 1900 and frantically searched for a job as a teacher. No one would hire him. He took up a job as a clerk at the Swiss Patent Office but failed to make an impression. His request for a promotion from a patent clerk third class to second class was rejected.
Most of his work in the office was related to the transmission of electric signals and electrical-mechanical synchronization of time. The brilliant scientist in him, however, was all the while busy performing experiments mentally behind the clerical desk.

Nobel Class Work by a Third Class Clerk
Many metals have the property of emitting electrons when light shines on them. Electrons emitted in this manner are called photoelectrons. When light is shone onto a piece of metal, a small current flows through the metal. The light gives its energy to the electrons in the atoms of the metal and allows them to move, producing the current. Not all colours of light affect metals in this way. For instance, red light cannot produce a current in a metal no matter how bright it is, but dim blue light is able to.
Einstein stated that light was made up of many small packets of energy called photons that behaved like particles. He showed that red light cannot dislodge electrons because its photons did not have sufficient energy. However, blue light is able to eject electrons — each blue photon has more energy than a red photon.

Einstein Chases Speed of Light
Einstein found out that the speed of light in a vacuum is constant and is an absolute physical boundary for motion, which means that nothing can travel faster than light.
1905 is hailed in the history of science as Einstein’s annus mirabilis — year of wonders. He produced four papers that changed the course of science. The first one was on light being made up of discrete packets of energy called photons (a paper on photoelectric effect). The second paper (not related to light) solved the problem of random movement of particles suspended in a fluid, using the molecular theory of matter. The third paper was on the famous Special Theory of Relativity, on the independence of velocity of light from the speed of the observer (light is one speed in the universe that is constant — that is, it’s always the same no matter how fast you’re moving when you measure it).
The fourth paper contained his famous equation E=mc2. Science had always treated matter and energy as two separate entities. Einstein showed that matter can be converted to energy and vice-versa at velocities comparable to that of light. This equation gave the formula for such a conversion, with ‘E’ as the energy, ‘m’ as the mass of the matter that is being converted to energy and ‘c’ as the speed of light. Light has an incredible speed of 300 million metres per second in a vacuum.
Einstein published more than 300 scientific papers and 150 non-scientific papers in his lifetime. The General Theory of Relativity, which Einstein developed in 1916 and Quantum Mechanics to which he contributed immensely, are the two pillars of modern physics. In 1917, Einstein published an article which led to a process that makes lasers possible. The laser is one form of light that has many applications in modern medicine and industry.
Einstein,whom many regard as the greatest genius that ever lived on this planet, passed away on 18 April, 1955 at Princeton,in New Jersey, USA.

— Dr. A.P. Jayaraman

Liked This Science Item? Then Rate It.

 Select A
 DIMDIMA Site

 


 Terms of Use | Site Map | Privacy Policy | Testimonials | Feedback | About Us | Contact Us | Link to Us | Links | Advertise with Us
Copyright © 2013 dimdima.com. All Rights Reserved.