light speed

USAGE SUMMARY

"light speed" is a correct and usable phrase in written English.
It is typically used as an idiom to mean "very fast" or "at a very high speed", and often in a metaphorical sense. For example, "John was working at light speed to finish his project."

✓ Grammatically correct

News & Media

Science

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

That otherwise light speed would be infinite.

Massachusetts Institute of Technology

Gaining mass as you approach light speed?

The Guardian

It's happening at light speed, every day.

The New Yorker

The second rule is just the familiar light speed limit.

Cornell University

Some inoffensive ribaldry rocketing by at light speed.

The New York Times

Light speed reduction to 17 metres per second in an ultracold atomic gas.

Harvard University

At a tenth of light speed, such a collision could vaporize the spacecraft.

MIT Technology Review

That translates into an average exhaust velocity of about 70percentnt light speed.

MIT Technology Review

Speed of light, speed at which light waves propagate through different materials.

Britannica

What makes this result so sensational is the relationship between light speed and causality.

The Guardian

The exploitation of the Star Wars franchise continues at light speed.

Independent

Expert writing Tips

Best practice

When using "light speed" metaphorically, ensure the context clearly indicates that you are referring to something happening very quickly, not literally at the speed of light.

Common error

Avoid using "light speed" in contexts where a precise scientific measurement is required. Opt for "speed of light" or specify the actual velocity when accuracy is paramount.

Linguistic Context

The phrase "light speed" functions primarily as a noun phrase, often used to denote the velocity of light or, metaphorically, to describe something happening very quickly. Ludwig provides numerous examples demonstrating its usage in both scientific and general contexts.

Expression frequency: Very common

Frequent in

News & Media

37%

Science

32%

Academia

21%

Less common in

Encyclopedias

5%

Formal & Business

5%

Reference

0%

Ludwig's WRAP-UP

In summary, "light speed" is a versatile phrase primarily functioning as a noun phrase, frequently used across various contexts from scientific discussions to everyday conversations. While scientifically, it denotes the velocity of light, it's often employed metaphorically to describe the rapid pace of events or processes. As Ludwig AI confirms, the phrase is grammatically sound and widely accepted. Understanding the context is crucial to discern whether it's used literally or figuratively. Be sure to consider alternatives such as "speed of light" for precision or "lightning fast" for a more vivid description.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

speed of light

This is the technically correct term and a more precise alternative.

warp speed

Implies a speed much faster than light, often used in science fiction.

extremely high velocity

Replaces the specific term with a more general description of speed.

breakneck speed

Emphasizes the dangerous or reckless nature of the speed.

lightning fast

Uses a different natural phenomenon to illustrate speed.

supersonic speed

Relates to speeds faster than the speed of sound, not necessarily light.

at an accelerated pace

Focuses on the rate of increase rather than the absolute speed.

rapidly advancing

Describes progress happening very quickly.

instantaneously

Implies something happening without any measurable delay.

with great alacrity

Highlights the eagerness and speed with which something is done.

FAQs

How to use "light speed" in a sentence?

You can use "light speed" to describe processes that happen extremely fast, like "Technology is evolving at "light speed"" or to refer to the actual velocity of light.

What can I say instead of "light speed"?

Depending on the context, you can use alternatives like "speed of light" for scientific accuracy, or "lightning fast" for a more figurative description of rapid movement or progress.

Is it correct to say something travels faster than "light speed"?

While theoretically nothing can travel faster than the speed of light in a vacuum according to current physics, the phrase "faster than "light speed"" is often used metaphorically to emphasize extreme speed or rapid advancement. Be mindful of your audience to not confuse physics.

What's the difference between "light speed" and "speed of light"?

"Light speed" is often used informally or metaphorically to describe something very fast, while "speed of light" is the precise scientific term for the velocity of light in a vacuum (approximately 299,792,458 meters per second).