was johannes geiger discoveries useful?
929161
yes. geiger's invention, the geiger counter, is inherently important in towns or areas suffering from radiation poisoning. it allows families and individuals to determine whether or not their food, clothing, and other items are safe to use. it also helps scientists in their testing by determining how much radioactivity there is in a particular substance.
172594
he found the phenomena of radioactivity though accidently but he did
1134438
Physics – Literature \n1901 - W. C. Röntgen (Germany, 1845-03-27 - 1923-02-10) Discovery of X rays\n\nHis detailed biography available at http://www.worldofbiography.com/9072-Wilhelm%20Roentgen/index1.htm
938373
Rutherford and Bohr did much of the early theoretical work on the structure of the atom but the real breakthrough was in 1938 when the Austrian physicist Lise Meitner and the German chemist Otto Hahn bombarded uranium with neutrons and caused it to splinter into barium and krypton. \n\nShe coined the term "fission" for this process. borrowing a term from biology. When the Nobel Prize was awarded for this joint work over 30 years, after WW2, he was awarded it and she was omitted. Being female and Jewish had caused her career to be eclipsed by his.
1185074
No.  When first discovered, the discoverer didn't know what to call it, so he used the term "x" whilst trying to determine a more appropriate designation.  He never did, and the term "x-ray" persists to this day.  His name, btw, was William Conrad Roentgen.  The device with which he discovered x-rays was the Crooke's Tube.\nThe first x-ray - also called a "radiograph" - of a human part was a radiograph of his own left hand.  Here's a challenge for you: was Professor Roentgen married at the time?
840619
Exploration and discovery
80856
He was the first to come up with a good system of classifying all life on earth. His system, with variations, is still in wide use today. \n\nVery Important Person to scientists!
326065
There are some fields of human activity that exist and develop, solely for the advancement of knowledge, regardless of whether we find any use of that knowledge or not. Theoretical Physics in general (and particle physics in particular), happens to be one of those fields. Though the results of particle physics may someday prove useful in many areas that DO exist solely for their utility, theoretical and experimental particle physics, for the most part, do not have the utility factor in view. \n\nHence, particle physicists do not need to provide justification of their discoveries of particles in materialistic or utilitarian terms. I hope that answers your question.
223640
He observed sun spots moving on the surface of the sun. All of them moved in the same direction, just as similar things on the surface of the Earth would do. \n\nIt may be of some interest to note that this was only an inference from the evidence. A very convincing inference and enough, wiht some other things, to cause trouble with the Church. Direct evidence of the sun's rotation came rather later, with photography and better telescopes, and somewhat later, Doppler spectroscopy. \n\nSince Galileo is thought to have lost his sight at least in part because of his solar observations (quite dangerous to look directly at the Sun, but it's still more dangerous to look at it directly through a telescope), these later observational techniques probably saved a goodly number of eyes.
784805
Yes, a few times over its history and they were very interesting.  There was the time when they received pulses a few "hundred times a second."   That's right pulses a few hundred times a second, this could only be from a civilization.  What in nature, especially astronomy pulsed so strong, that fast that it could reach another star system?  Well, they're called Pulsars.\n\nThe first pulsar was discovered by chance by Jocelyn Bell and Anthony Hewish in 1967 who were actually studying distant galaxies at the time. Jocelyn Bell noticed small pulses of radiation when their telescope was looking at a particular position in the sky and for a short time scientists thought they might be coming from an extra-terrestrial civilisation. In fact the source of these pulses were initially referred to as LGM1, Little Green Man 1. Once established that the signals were not of this origin (and also not caused by people on Earth), the unidentified object they were coming from was called a "pulsar" because the emission was pulsed.\nhttp://outreach.atnf.csiro.au/education/everyone/pulsars/\n\nThen there are Quasars and other exotics systems that have surprised scientists with their signals, only later to be discovered natural.
916464
He didn't actually do the experiment, he supervised it.  It happened in 1909, and you can read all about it here:\n\nhttp://en.wikipedia.org/wiki/Geiger-Marsden_experiment
153692
I'm sure many of the famous astronomers before him like Edwin Hubble, Harlow Shapley, James Jeans (mentioned by person in an interview) where all important to his work.  Check out some of his papers in the Astrophysical Journal or the Astronomical Jounal and check who the references are.
201375
I do not believe there will be any "discoveries" for some time... in Physics, the theory is generally proposed first and then the emperical data is gathered to prove or disprove it, and the theory still has a way to go...
432439
They certainly do have good scientists to make such important discoveries/developments. What's scary is whether politicians in that country will use it for the right purpose.
129479
His name of the Invention of a so called Death Ray, of a sorts was mentioned in the Explosion that occured in Siberia, as well as a U.F.O Crashing, and, or Meteor hitting the Earth!
272299
why would you be stunned to learn that "zee germans" invented many useful things?  They invented the jet engine during the same war, along with mustard gas and sourkraut.
82563
If by candles you mean light, He did experiments on whether or not magnetic fields could influence light.  He discovered it did, but only with led glass not flint, rock crysal or calcareous spar.  He is quoted as saying "Thus magnetic force and light were proved to have relation to each othere.  This fact will likely prove exceeingly fertile and of great value in the investigation of both conditions of natural force."  The Faraday Effect.