https://www.youtube.com/watch?v=DzTEIz36B5g
In this part of the online game ABC Zoom, players use photons of green light to excite enough gas atoms to generate an orange laser beam. Key concepts: pho

https://www.youtube.com/watch?v=Aggi0g67uXM
Zoom inside a glass prism and see why glass makes light bend, and how the glass molecules make different colours of light bend different amounts. Key concept

https://www.youtube.com/watch?v=NX3uEhJTWWc
In this part of the online game ABC Zoom, players find the colour of visible light that a receiver is tuned to by matching the wavelengths of the receiver an

https://www.livescience.com/physics-mathematics/how-do-lasers-work
Lasers work by making energetic particles vibrate, or "oscillate," in sync, meaning the peaks and troughs of light waves they emit all line up. Think of an army marching in formation compared with

https://www.explainthatstuff.com/lasers.html
How lasers work. Before you can understand how a laser works, you need to know how an atom can give off light. If you're not sure how this happens, take a look at the box how atoms make light in our introductory article about light. A laser is effectively a machine that makes billions of atoms pump out trillions of photons (light particles) all at once so they line up to form a really

https://www.edmundoptics.com/knowledge-center/application-notes/lasers/fundamentals-of-lasers/
Figure 1: The structure of a laser diode causes the elliptical beam shape typically associated with laser diodes. Fan Angle: The fan angle is the angle produced by accessory line or pattern generators. Figure 2 shows how the fan angle of a laser diode module line generator is calculated. Figure 2: Laser diode module line generator fan angle.

https://physicsworld.com/a/how-lasers-really-work/
A conventional laser comprises an optical gain medium, such as a gas, that is sandwiched between two mirrors in an optical cavity. The gain medium is "pumped" using an external source of light or electric field such that most of its atoms or molecules are in higher energy excited states. When these states decay, they emit light that bounces

https://www.edmundoptics.com/knowledge-center/video/tutorials/understanding-lasers-and-how-theyre-used-every-day/
Understanding Lasers and How They're Used Every Day. Lasers are optical devices that are used in many of the things that we use every day from laser surgery to high speed internet. Watch this video to learn all about lasers, what makes them special compared to other light sources, and some of the ways they are used.

https://spaceplace.nasa.gov/questions-and-answers/laser/
Lasers produce a narrow beam of light in which all of the light waves have very similar wavelengths. The laser's light waves travel together with their peaks all lined up, or in phase. This is why laser beams are very narrow, very bright, and can be focused into a very tiny spot. This animation is a representation of in phase laser light waves.

https://www.abc.net.au/news/2023-01-17/scientists-use-laser-to-guide-lightning-bolt-for-first-time/101861990
Scientists have worked for years to replace the simple metal pole with a laser. They have guided a lightning bolt for more than 50 metres. Lightning strikes between 40 to 120 times a second

https://www.azooptics.com/Article.aspx?ArticleID=368
Lasers use a process called "stimulated emission" in a gain medium to produce a beam of coherent light, which means that the light waves which make up the beam oscillate perfectly in sync. One of

https://www.sciencealert.com/what-are-lasers-and-how-do-they-actually-work
By ScienceAlert Staff. Laser light being guided by a lens. (Chris Rogers/Getty Images) Lasers are devices that concentrate beams of light by forcing their waveforms and frequencies to align. First developed in the 1960s to amplify microwaves, modern lasers technology can ramp up light rays in just about any part of the electromagnetic spectrum

https://phys.libretexts.org/Bookshelves/Optics/BSc_Optics_(Konijnenberg_Adam_and_Urbach)/07%3A_Lasers/7.04%3A_Amplification
7.3: Amplification is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. Amplification can be achieved by a medium with atomic resonances that are at or close to one of the resonances of the resonator. We first recall the simple theory developed by Einstein in 1916 of the ….

https://kids.britannica.com/kids/article/laser/353362
A laser is an instrument that can produce a powerful beam of light . The word laser stands for the scientific words that explain how a laser beam is produced: " l ight a mplification by the s timulated e mission of r adiation."

https://stemeducationworks.com/blog/the-physics-of-lasers/
The Inner Workings of a Laser. The process of creating a laser beam first starts with a chamber filled with molecules in a gaseous or solid state (CO2 gas in the case of the Glowforge). A voltage is then applied across this chamber and, as electric current passes through the medium, the electrons around the atoms in the gas or solid become

https://www.abc.net.au/education/can-photons-and-atoms-generate-laser/13761056
Electrons around atoms can absorb and emit photons of particular colours of light. See three different atomic models explain what's going on. Production Date: 2013.

https://www.scienceabc.com/eyeopeners/how-do-binoculars-work.html
Binoculars cleverly use the concept of optics to enable us to view distant objects with ease. Their design is based on the principles of light refraction. As a kid, I always wanted to own a super-cool pair of binoculars that the S.H.I.E.L.D. agents used in Marvel movies. Imagine being able to look through walls and see every technical detail of

https://www.scienceabc.com/innovation/what-is-a-laser-collimator.html
A laser collimator is a device that is used to narrow a beam of light. It can be used to arrange the beam of light in a particular direction, or to reduce the spatial cross-section of a beam to make it smaller. A laser collimator is often used to collimate a laser beam, which means to convert a beam of scattered light into a beam of parallel

https://www.abc.net.au/news/science/2021-09-12/australias-first-space-laser-communications-installed-wa/100406742
A new Australian optical station could receive HD footage of astronauts walking on the Moon in 2024. For a tense moment, my career hung from a crane hook. The telescope is the first of its kind in

https://www.youtube.com/watch?v=ypet3-yeZro
In this part of the online game ABC Zoom, players must align magnets to make an electron beam oscillate, producing an X-ray beam. ABC Zoom is a science-base

https://www.sciencealert.com/physicists-have-built-an-atom-laser-they-say-can-stay-on-forever
Atom lasers have been around for a minute. The first atom laser was created by a team of MIT physicists back in 1996. The concept sounds pretty simple: just as a traditional light-based laser consists of photons moving with their waves in sync, a laser made of atoms would require their own wave-like nature to align before being shuffled out as

https://www.abc.net.au/news/science/2019-08-17/laser-eye-surgery-explained/11399794
Laser surgery simply moves the prescription from your glasses onto your cornea so that light focuses sharply on the retina. But it is most effective at times in your life when your eyesight is

https://www.scienceabc.com/pure-sciences/double-slit-experiment.html
The objective of the experiment is to see the underlying make-up of light and matter. Let's start with something familiar, bullets from a machine gun. Our gun fires bullets at regular intervals towards the range of the two slits. The experiment done with bullets. Two straight lines appear on the projector.