Who invented the laser ?

Last Answer : While traveling through the vacuum of space, laser beams are invisible unless shot directly into your eye. The experience you know of as vision consists of light entering your eyes and being detecting by cells ... dramatic to see a flash of light shoot out of a gun than nothing visible shoot out.

What is used to make a laser ?

Description : What is used to make a laser ?

Last Answer : Plane mirrors are used to make lasers.

The Laser is a beam of radiations which are – (1) Non-coherent and monochromatic (2) Coherent and monochromatic (3) Non-coherent and non-monochromatic (4) Coherent and non-monochromatic

Description : The Laser is a beam of radiations which are – (1) Non-coherent and monochromatic (2) Coherent and monochromatic (3) Non-coherent and non-monochromatic (4) Coherent and non-monochromatic

Last Answer : (2) Coherent and monochromatic Explanation: Laser, an acronym for Light Amplification by Stimulated Emission of Radiation, creates a radiation beam that is coherent (in-phase). In a coherent light ... results in a radiation beam of great intensity. It normally produces only one or two wavelengths.

Where are mesons found? (1) Cosmic rays (2) X-rays (3) Gamma rays (4) Laser beam

Description : Where are mesons found? (1) Cosmic rays (2) X-rays (3) Gamma rays (4) Laser beam

Last Answer : (1) Cosmic rays Explanation: Mesons are not produced by radioactive decay, but appear in nature only as short-lived products of very high-energy interactions in matter, between particles made ... subatomic particles composed of one quark and one anti-quark, bound together by the strong interaction.

Light beam which is highly directional is called: (1) eraser (2) grazer (3) maser (4) laser

Description : Light beam which is highly directional is called: (1) eraser (2) grazer (3) maser (4) laser

Last Answer : (4) laser Explanation: Laser light is very different from normal light. It is very directional, has a very tight beam and is very strong and concentrated. The light released is monochromatic. It contains one specific wavelength of light (one specific colour).

The device used for locating submerged objects under sea is – (1) sonar (2) radar (3) laser (4) maser

Description : The device used for locating submerged objects under sea is – (1) sonar (2) radar (3) laser (4) maser

Last Answer : (1) sonar Explanation: Sonar (originally an acronym for Sound Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate ... acoustic location and of measurement of the echo characteristics of "targets" in the water.

In a Laser (say neon laser) all the atoms emit the light waves of – (1) Same frequency (2) Same amplitude (3) Same phase (4) All of the above

Description : In a Laser (say neon laser) all the atoms emit the light waves of – (1) Same frequency (2) Same amplitude (3) Same phase (4) All of the above

Last Answer : (4) All of the above Explanation: In a Laser all the atoms emit the light waves of same frequency, amplitude and phase. A laser is a device that emits light (electromagnetic radiation) ... photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation.

Laser is a device to produce - (1) a beam of white light (2) coherent light (3) microwaves (4) X-rays

Description : Laser is a device to produce - (1) a beam of white light (2) coherent light (3) microwaves (4) X-rays

Last Answer : (2) coherent light Explanation: In physics, two wave sources are perfectly coherent if they have a constant phase difference and the same frequency, and the same waveform. Coherence is an ideal property of waves that enables stationary (i.e. temporally and spatially constant) interference.

What is the color of light emitted from an Argon-Ion laser?

Description : What is the color of light emitted from an Argon-Ion laser?

Last Answer : ANSWER: GREEN or BLUE-GREEN

What does the letter "s" stand for in the acronym laser? w) scientific x) simulated y) stimulated z) solar

Description : What does the letter "s" stand for in the acronym laser? w) scientific x) simulated y) stimulated z) solar

Last Answer : ANSWER: Y -- STIMULATED (LIGHT AMPLIFICATION BY STIMULATED MISSI)

Laser radiation is: w) monochromatic x) directed in a narrow beam y) produced with large power densities z) all of the above

Description : Laser radiation is: w) monochromatic x) directed in a narrow beam y) produced with large power densities z) all of the above

Last Answer : ANSWER: Z -- ALL OF THE ABOVE

What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers

Description : What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers

Last Answer : ANSWER: X -- 633 NANOMETERS (actually 632.8 nm)

The characteristic that distinguishes a laser beam from an ordinary light beam is: w) the greater frequency of the laser beam x) the coherence of the laser beam y) the color of the laser beam z) the greater polarization of the laser beam

Description : The characteristic that distinguishes a laser beam from an ordinary light beam is: w) the greater frequency of the laser beam x) the coherence of the laser beam y) the color of the laser beam z) the greater polarization of the laser beam

Last Answer : ANSWER: X -- THE COHERENCE OF THE LASER BEAM

The Laser is a beam of radiations which are (1) Non-coherent and monochromatic (2) Coherent and monochromatic (3) Non-coherent and non-monochromatic (4) Coherent and non-monochromatic

Description : The Laser is a beam of radiations which are (1) Non-coherent and monochromatic (2) Coherent and monochromatic (3) Non-coherent and non-monochromatic (4) Coherent and non-monochromatic

Last Answer : Coherent and monochromatic

Light beam which is highly directional is called: (1) eraser (2) grazer (3) maser (4) laser

Description : Light beam which is highly directional is called: (1) eraser (2) grazer (3) maser (4) laser

Last Answer : laser

The device used for locating submerged objects under sea is. (1) sonar (2) radar (3) laser (4) maser

Description : The device used for locating submerged objects under sea is. (1) sonar (2) radar (3) laser (4) maser

Last Answer : sonar

In a Laser (say neon laser) all the atoms emit the light waves of (1) Same frequency (2) Same amplitude (3) Same phase (4) All of the above

Description : In a Laser (say neon laser) all the atoms emit the light waves of (1) Same frequency (2) Same amplitude (3) Same phase (4) All of the above

Last Answer : All of the above

Where are mesons found ? (1) Cosmic rays (2) X-rays (3) Gamma rays (4) Laser beam

Description : Where are mesons found ? (1) Cosmic rays (2) X-rays (3) Gamma rays (4) Laser beam

Last Answer : Cosmic rays

Who invented the air pump ?

Description : Who invented the air pump ?

Last Answer : Von Guerick invented the air pump.

Who Invented the Reflector Telescope ?

Description : Who Invented the Reflector Telescope ?

Last Answer : Scientist Newton invented the reflecting telescope.

Who invented the absolute temperature scale ?

Description : Who invented the absolute temperature scale ?

Last Answer : Kelvin, the inventor of the absolute temperature scale.

Who invented the electric field line to get an idea about the electric field ?

Description : Who invented the electric field line to get an idea about the electric field ?

Last Answer : : Michael Faraday introduced the electric field line to get an idea of the electric field.

Who invented the theory of light ?

Description : Who invented the theory of light ?

Last Answer : Ibn al-Haytham and al-Hazen discovered the theory of light.

Who invented the barcode ?

Description : Who invented the barcode ?

Last Answer : Bernard Silver discovers barcodes.

Who invented the fountain pen ?

Description : Who invented the fountain pen ?

Last Answer : Patricia Poneru discovers the fountain pen.

Who invented roller skates ?

Description : Who invented roller skates ?

Last Answer : James Plimton invented roller skates.

Who invented basketball ?

Description : Who invented basketball ?

Last Answer : James Neismith invented basketball.

Who invented football ?

Description : Who invented football ?

Last Answer : James Neismith invented football.

Who invented the mouse ?

Description : Who invented the mouse ?

Last Answer : Douglas Engelbert discovers the mouse.

Who invented the projector ?

Description : Who invented the projector ?

Last Answer : Knowing the projector, Dolph.

Who invented the transformer ?

Description : Who invented the transformer ?

Last Answer : Mixa Derry discovers transformer.

Who invented the name "Atom" ?

Description : Who invented the name "Atom" ?

Last Answer : The Greek philosopher Democritus invented the word "atom" and named the first atom.

Who invented the theory of relativity ?

Description : Who invented the theory of relativity ?

Last Answer : Albert Einstein was the inventor of the theory of relativity.

Who Invented the Light Wave Theory ?

Description : Who Invented the Light Wave Theory ?

Last Answer : Hygen invented the wave theory of light.

Who invented the electron ?

Last Answer : Thomson discovers electrons.

Who invented the Centigrade scale? (1) Anders Celsius (2) Daniel Gabriel Fahrenheit (3) William Thomsor (4) Wright Brothers

Description : Who invented the Centigrade scale? (1) Anders Celsius (2) Daniel Gabriel Fahrenheit (3) William Thomsor (4) Wright Brothers

Last Answer : (1) Anders Celsius Explanation: Swedish astronomer Anders Celsius invented the Celsius temperature scale in 1742 A.D The Celsius scale invented by him has 100 degrees between the freezing point (0 C) and boiling point (100 C) of pure water at sea level air pressure.

Alfred Nobel invented - (1) X ray (2) Diesel Engine (3) Dynamite (4) Dynamo

Description : Alfred Nobel invented - (1) X ray (2) Diesel Engine (3) Dynamite (4) Dynamo

Last Answer : (3) Dynamite Explanation: Alfred Nobel if Sweden invented Dynamite in 1867, X ray was invented by Wilhelm Roentgen of Germany in 1895, Diesel Engine was invented by Rudolf Diesel of Germany 1892, Dynamo was invented by Michael Faraday of England in 1831.

Postage Meter was invented by - (1) Fyodor Pirotsky (2) Arthur Pitney (3) Fritz Pfleumer (4) Stephen Perry

Description : Postage Meter was invented by - (1) Fyodor Pirotsky (2) Arthur Pitney (3) Fritz Pfleumer (4) Stephen Perry

Last Answer : (2) Arthur Pitney Explanation: The first postal meter to be commercially produced and distributed was invented by Arthur Pitney. World's first postage meter on December 9, 1901.

Who among the following invented battery? (1) Rudolf Diesel (2) Alfred Noble (3) Alessandro Volta (4) John Napier

Description : Who among the following invented battery? (1) Rudolf Diesel (2) Alfred Noble (3) Alessandro Volta (4) John Napier

Last Answer : (3) Alessandro Volta Explanation: Alessandro Giuseppe Antonio Anastasio Volta was an Italian physicist, chemist, and a pioneer of electricity and power, who is credited as the inventor of the electric battery and the discoverer of methane.

Who invented the Lightning Rod in 1749? (1) Benjamin Franklin (2) Nikola Tesla (3) Eli Whitney (4) George Washington

Description : Who invented the Lightning Rod in 1749? (1) Benjamin Franklin (2) Nikola Tesla (3) Eli Whitney (4) George Washington

Last Answer : (1) Benjamin Franklin Explanation: The principle of the lightning rod was first detailed by Benjamin Franklin in Pennsylvania in 1749. In the subsequent years, he developed his invention for household application (published in 1753) and further improvements towards a reliable system around 1760.

Electron microscope was invented by – (1) Knoll and Ruska (2) Robert. Koch (3) Lecuwenhock (4) C.P. Swanson

Description : Electron microscope was invented by – (1) Knoll and Ruska (2) Robert. Koch (3) Lecuwenhock (4) C.P. Swanson

Last Answer : (1) Knoll and Ruska Explanation: It is widely accepted that the first prototype of an electron microscope was built by Ernst Ruska and Max Knoll in 1931; it was not more powerful than an ... . An electron microscope uses a beam of electrons to illuminate a specimen and produce a magnified image.

Stereo was invented by ________. (1) John Barber (2) Tim Berners-Lee (3) Alan Blumlein (4) David Brewster

Description : Stereo was invented by ________. (1) John Barber (2) Tim Berners-Lee (3) Alan Blumlein (4) David Brewster

Last Answer : (3) Alan Blumlein Explanation: Modern stereophonic technology was invented in the 1930s by British engineer Alan Blumlein at Electric and Musical Industries in London.

What was invented by 'Zacharias Janssen'? (1) Telescope (2) Microscope (3) Stethoscope (4) Periscope

Description : What was invented by 'Zacharias Janssen'? (1) Telescope (2) Microscope (3) Stethoscope (4) Periscope

Last Answer : (2) Microscope Explanation: In Boreel's investigation Johannes also claimed his father, Zacharias Jansen, invented the compound microscope in 1590.

Who invented the barometer? w) Torricelli x) Avogadro y) Rutherford z) Becquerel

Description : Who invented the barometer? w) Torricelli x) Avogadro y) Rutherford z) Becquerel

Last Answer : ANSWER: W -- TORRICELLI

Who invented the electric battery?

Description : Who invented the electric battery?

Last Answer : ANSWER: (ALLESANDRO) VOLTA

The first instrument used for measuring temperature was the gas thermoscope invented by: w) Celsius x) Galileo y) Centigrade z) Fahrenheit

Description : The first instrument used for measuring temperature was the gas thermoscope invented by: w) Celsius x) Galileo y) Centigrade z) Fahrenheit

Last Answer : ANSWER: X -- GALILEO

Who invented the laser ?

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