B2 중상급 English 5:58 674 단어 Educational

Will laser blasters ever be possible? - Christopher Baird

TED-Ed · 141,997 조회수 · Added 5시간 전

Learning Stats

B2

CEFR 레벨

674

Total Words

347

Unique Words

6/10

난이도

Vocabulary Diversity 51%

자막 (83 segments)

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00:07

Dropping out of light speed,

00:08

a fleet of rebel spaceships is greeted by a frenzy of laser blasts—

00:13

illuminating the sector with brilliant bursts of light.

00:18

Science fiction has shown us scenes like this for decades,

00:22

but the lasers in our daily lives seem far less dazzling and destructive.

00:27

Laser eye surgery can cut tissue, and laser cutters can shape wood or plastic,

00:33

but neither seems strong enough to pierce a spaceship.

00:38

And laser pointers are more likely to annoy a cat than an evil empire.

00:43

So could sci-fi laser weaponry ever exist?

Full subtitles available in the video player

Key Vocabulary (18)

coherent C1 adjective

Describes a statement, argument, or piece of writing that is clear, logical, and consistently organized. It implies that all separate parts fit together perfectly to form a sensible and understandable whole.

"The essay presents a coherent argument throughout."

large A1 noun

A specific size category for items such as clothing, coffee, or containers that is bigger than medium. It is commonly used when selecting from a range of standard sizes in shops and restaurants.

same A1 adjective

The word 'same' is used to describe things or people that are identical or not different from each other. It indicates that two or more things are exactly alike in every way or are the very same entity.

"We have the same birthday!"

emission B2 adjective

The production and discharge of something, especially gas or radiation, into the environment. It is most commonly used in environmental science to describe the release of pollutants from vehicles, factories, or natural sources.

light A1 adjective

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.

"This is very light."

laser A1 noun

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.

beams
lasers
particles
stimulated
beam
electrons
synchronized
photon
color
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