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Harold Edgerton

Harold Edgerton is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Harold Edgerton rather than just read about it. In short: Harold Eugene Edgerton (April 6, 1903 – January 4, 1990), also known as Papa Flash, was an American scientist and researcher, a professor of electrical engineering at the Massachusetts Institute of Technology. He is largely credited with transforming the stroboscope from an obscure laboratory instrument into a common device.

Harold Edgerton — main illustration
Harold Edgerton — illustration

Key takeaways

  • Harold Edgerton belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Harold Edgerton to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Harold Edgerton from memory before moving on to harder problems.

Reference excerpt

Harold Eugene Edgerton (April 6, 1903 – January 4, 1990), also known as Papa Flash, was an American scientist and researcher, a professor of electrical engineering at the Massachusetts Institute of Technology. He is largely credited with transforming the stroboscope from an obscure laboratory instrument into a common device. He also was deeply involved with the development of sonar and deep-sea photography, and his equipment was used in collaboration with Jacques Cousteau in searches for shipwrecks and even the Loch Ness Monster.

Biography

Early years Edgerton was born in Fremont, Nebraska, on April 6, 1903, the son of Mary Nettie Coe and Frank Eugene Edgerton, a descendant of Samuel Edgerton, the son of Richard Edgerton, one of the founders of Norwich, Connecticut, and Alice Ripley, a great-granddaughter of Governor William Bradford (1590–1657) of the Plymouth Colony and a passenger on the Mayflower. His father was a lawyer, journalist, author and orator and served as the assistant attorney general of Nebraska from 1911 to 1915. Edgerton grew up in Aurora, Nebraska. He also spent some of his childhood years in Washington, DC, and Lincoln, Nebraska.

Education

In 1925 Edgerton received a bachelor's degree in electrical engineering from the University of Nebraska where he became a member of Acacia fraternity. He earned an SM in electrical engineering from MIT in 1927. Edgerton used stroboscopes to study synchronous motors for his ScD thesis in electrical engineering at MIT, awarded in 1931. He credited Charles Stark Draper with inspiring him to photograph everyday objects using electronic flash; the first was a stream of water from a faucet. In 1936 Edgerton visited hummingbird expert May Rogers Webster. He was able to illustrate with her help that it was possible to take photographs of the birds beating their wings 60 times a second using an exposure of one hundred thousandth of a second. A picture of her with the birds flying around her appeared in National Geographic.

Career

In 1937 Edgerton began a lifelong association with photographer Gjon Mili, who used stroboscopic equipment, in particular, multiple studio electronic flash units, to produce photographs, many of which appeared in Life magazine. When taking multiflash photographs this strobe light equipment could flash up to 120 times a second. Edgerton was a pioneer in using short duration electronic flash in photographing fast events photography, subsequently using the technique to capture images of balloons at different stages of their bursting, a bullet during its impact with an apple, or using multiflash to track the motion of a devil stick, for example. He was awarded a bronze medal by the Royal Photographic Society in 1934, the Howard N. Potts Medal from the Franklin Institute in 1941, the Golden Plate Award of the American Academy of Achievement in 1966, the David Richardson Medal by the Optical Society of America in 1968, the Albert A. Michelson Medal from the same Franklin Institute in 1969, and the National Medal of Science in 1973. Edgerton partnered with Kenneth J. Germeshausen to do consulting for industrial clients. Later Herbert Grier joined them. The company name "Edgerton, Germeshausen, and Grier" was changed to EG&G in 1947. EG&G became a prime contractor for the Atomic Energy Commission and had a major role in photographing and recording nuclear tests for the US through the fifties and sixties. For this role Edgerton and Charles Wykoff and others at EG&G developed and manufactured the Rapatronic camera. His work was instrumental in the development of side-scan sonar technology, used to scan the sea floor for wrecks. Edgerton worked with undersea explorer Jacques Cousteau, by first providing him with custom-designed underwater photographic equipment featuring electronic flash, and then by developing sonar techniques used to discover the Britannic. Edgerton participated in the discovery of the American Civil War battleship USS Monitor. While working with Cousteau, he acquired the nickname "Papa Flash". In 1988 Doc Edgerton worked with Paul Kronfield in Greece on a sonar search for the lost city of Helike, believed to be the basis for the legend of Atlantis. Edgerton co-founded EG&G, Inc., which manufactured advanced electronic equipment including side-scan sonars and sub-bottom profiling equipment. EG&G also invented and manufactured the Krytron, the detonation trigger for the hydrogen bomb, and an EG&G division supervised many of America's nuclear tests. In addition to having the scientific and engineering acumen to perfect strobe lighting commercially, Edgerton is equally recognized for his visual aesthetic: many of the striking images he created in illuminating phenomena that occurred too fast for the naked eye now adorn art museums worldwide. In 1940, his high speed stroboscopic short film Quicker'n a Wink won an Oscar. Edgerton was appointed a professor of electrical engineering at the Massachusetts Institute of Technology (MIT) in 1934. At MIT Edgerton created a technology lab nicknamed Strobe Alley, considered by author Pagan Kennedy as a forerunner of the Hackerspace. This lab and its encouragement of tinkering and invention influenced the careers of MIT students such as Martin Klein, who contributed to the development of side scan sonar. In 1956, Edgerton was elected a Fellow of the American Academy of Arts and Sciences. He became a member of the United States National Academy of Sciences in 1964 and a member of the American Philosophical Society in 1972. He was especially loved by MIT students for his willingness to teach and his kindness: "The trick to education", he said, "is to teach people in such a way that they don't realize they're learning until it's too late". His last undergraduate class, taught during fall semester 1977, was a freshman seminar titled "Bird and Insect Photography". One of the graduate student dormitories at MIT carries his name. In 1962, Edgerton appeared on I've Got a Secret, where he demonstrated strobe flash photography by shooting a bullet into a playing card and photographing the result. Edgerton's work was featured in an October 1987 National Geographic Magazine article entitled "Doc Edgerton: the man who made time stand still".

… excerpt ends here. Continue reading the full article.

Illustrations

Harold Edgerton illustration
Harold Edgerton: A 1936 picture of May Rogers Webster with hummingbirds
A 1936 picture of May Rogers Webster with hummingbirds
Harold Edgerton: Nuclear explosion captured by Edgerton's Rapatronic camera
Nuclear explosion captured by Edgerton's Rapatronic camera
Harold Edgerton: Shadowgraph of bullet in flight using Edgerton's equipment and stroboscope
Shadowgraph of bullet in flight using Edgerton's equipment and stroboscope
Harold Edgerton: Milk Drop Coronet (1957)
Milk Drop Coronet (1957)

Worked examples

Example 1 — a first encounter with Harold Edgerton

Start with the simplest possible case. Write down what Harold Edgerton claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Harold Edgerton before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Harold Edgerton ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Harold Edgerton

In research
Harold Edgerton appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Harold Edgerton in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Harold Edgerton is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1903 births, 1990 deaths, 20th-century American engineers, so understanding it makes those chapters shorter.
In everyday life
Look for Harold Edgerton outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Harold Edgerton in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Harold Edgerton means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Harold Edgerton out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Harold Edgerton in simple terms?

Harold Eugene Edgerton (April 6, 1903 – January 4, 1990), also known as Papa Flash, was an American scientist and researcher, a professor of electrical engineering at the Massachusetts Institute of Technology. He is largely credited with transforming the stroboscope from an obscure laboratory instr…

Why does Harold Edgerton matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Harold Edgerton?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Harold Edgerton.

Tags

  • 1903 births
  • 1990 deaths
  • 20th-century American engineers
  • 20th-century American male photographers
  • 20th-century American photographers
  • Burials at Mount Auburn Cemetery
  • Engineers from Nebraska
  • Fellows of the American Academy of Arts and Sciences
  • Howard N. Potts Medal recipients
  • MIT School of Engineering alumni
  • MIT School of Engineering faculty
  • Members of the American Philosophical Society

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