Translator tool. What is the pronunciation of laser? Browse lasagne. Test your vocabulary with our fun image quizzes. Image credits. Word of the Day kind-hearted. About this. Blog Outsets and onsets! Read More. November 08, To top. English American Business Examples Translations. Sign up for free and get access to exclusive content:. Free word lists and quizzes from Cambridge. Tools to create your own word lists and quizzes. Word lists shared by our community of dictionary fans.
The pumping excites the electrons in the atoms, causing them to jump to higher orbits, creating a "population inversion. The photons stimulate other excited electrons to emit more photons with the same energy and thus the same wavelength as the original.
The light waves build in strength as they pass through the laser medium, and the mirrors at both ends keep reflecting the light back and forth creating a chain reaction and causing the laser to "lase. In semiconductor lasers, both mirrors often transmit a beam, the second one being used for monitoring purposes. Who Invented It? In , the laser was conceived by Gordon Gould, a graduate student in physics at Columbia University. In , after years of litigation, a court awarded Gould rights to the first of three patents and later to all of them.
He finally reaped millions in royalties. Abbreviation of l ight a mplification by s timulated e mission of r adiation. Origin of laser. Laser Sentence Examples. His laser gun lay where he fell. Matched Categories Optical Device. How to pronounce Laser? Alex US English. David US English. Mark US English. Daniel British. Libby British. Mia British. Karen Australian. Hayley Australian. Natasha Australian. Veena Indian. Priya Indian. Neerja Indian. Zira US English.
Oliver British. Wendy British. Fred US English. Tessa South African. How to say Laser in sign language? Oklahoma Attorney General Mike Hunter : The team and I remain laser focused on the goal we set since filing this lawsuit: holding those responsible for creating this crisis accountable and bring an end to the opioid epidemic in Oklahoma.
Philip Swibinski : That's what we're laser -focused on right now. Postmaster General : While we have had temporary service decline, which should not have happened, we are fixing this, in fact, last week service improved across all major mail and package categories and I am laser focused on improving service for the American public. Popularity rank by frequency of use Laser 1 The letters in the word laser stand for L ight A mplification by S timulated E mission of R adiation.
A laser is an unusual light source. It is quite different from a light bulb or a flash light. Lasers produce a very narrow beam of light. This type of light is useful for lots of technologies and instruments—even some that you might use at home! Light travels in waves, and the distance between the peaks of a wave is called the wavelength. Each color of light has a different wavelength. For example, blue light has a shorter wavelength than red light.
Sunlight—and the typical light from a lightbulb—is made up of light with many different wavelengths. Our eyes see this mixture of wavelengths as white light. This animation shows a representation of the different wavelengths present in sunlight.
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