Question
2. What is the speed of light in a vacuum?
Ask by Harrington Wang. in China
Feb 18,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The speed of light in a vacuum is about 299,792,458 meters per second, which is often simplified to 3.00 × 10⁸ m/s.
Solution
The speed of light in a vacuum is approximately \( c = 299,792,458 \) meters per second. This value is a fundamental constant in physics and is often rounded to \( 3.00 \times 10^8 \) m/s for simplicity in calculations.
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Did you know that light travels at an astonishing speed of approximately 299,792 kilometers per second, or about 186,282 miles per second? This speed is not just a number; it’s a universal constant represented by the letter "c" in physics, and it plays a crucial role in Einstein’s theory of relativity! In the real world, this incredible speed has some far-reaching implications! For instance, when we look up at stars, the light we see left those stars several years or even thousands of years ago. This means that stargazing is like looking back in time! So, the next time you admire the night sky, remember you're witnessing a cosmic history lesson!
