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Will laser blasters ever be possible? - Christopher Baird
AI Summary
This video examines whether science fiction laser weapons could ever become reality, while explaining how lasers actually work through the process of stimulated emission. Learners will build vocabulary around physics and optics, including terms like 'photons,' 'monochromatic,' 'coherent light,' and 'stimulated emission.' The video also covers real-world laser applications from barcode scanners to gravitational wave observatories, making it great for science and technology English.
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Subtitles (40 segments)
DownloadDropping out of light speed, a fleet of rebel spaceships is greeted by a frenzy of laser blasts— illuminating the sector with brilliant bursts of light.
Science fiction has shown us scenes like this for decades, but the lasers in our daily lives seem far less dazzling and destructive.
Laser eye surgery can cut tissue, and laser cutters can shape wood or plastic, but neither seems strong enough to pierce a spaceship.
And laser pointers are more likely to annoy a cat than an evil empire.
So could sci-fi laser weaponry ever exist?
And how do lasers even work in the first place?
Lasers are devices that produce laser beams, which are ultimately just a form of light.
But these beams have special properties.
Full subtitles available in the video player
Key Vocabulary (18)
A laser is a device that produces a very narrow and powerful beam of light. This light can be used for many things, such as cutting materials, performing medical operations, or reading barcodes.
Describes a space that has a lot of natural brightness or many windows. It also refers to colors that are pale or close to white rather than dark.
As a noun, 'beams' are long, sturdy pieces of wood or metal used to support a building's roof or floor. It can also refer to rays or shafts of light or another form of radiation. As a verb, it means to smile very happily and radiantly or to send out light.
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