Scientific

Kecepatan Cahaya

Definisi

Kecepatan pasti cahaya di ruang hampa: 299.792.458 meter per detik, yang sejak 1983 digunakan untuk mendefinisikan meter.

Penjelasan

Because the speed of light is fixed by definition, the meter is now defined as the distance light travels in 1/299,792,458 of a second. At this speed, light circles the Earth 7.5 times per second and travels from the Moon to Earth in about 1.28 seconds. Nothing with mass can reach this speed: at 99% of c, time dilation already causes a factor of 7 difference between moving and stationary clocks.

01

RELATED CONVERSIONS

Speed of Light → Meter per Second Speed of Light → Kilometer per Hour Speed of Light → Mile per Hour Speed of Light → Knot Speed of Light → Foot per Second Speed of Light → Mach
02

RELATED ARTICLES

Temperature Scales Explained: Celsius, Fahrenheit, and Kelvin

A complete guide to the four temperature scales in scientific and everyday use—Celsius, Fahrenheit, Kelvin, and Rankine—including their history, conversion formulas, and where they intersect.

 Speed Units Guide: MPH, KM/H, Knots, and Mach

A complete reference for speed units used around the world — from everyday driving speeds to the velocity of light.

 Energy Units Guide: Joules, Calories, BTU, and Kilowatt-Hours

A complete reference for energy units across physics, food science, electrical engineering, and fuel — with key conversions and real-world examples.
03

RELATED TERMS

Nol Mutlak

Suhu terendah yang mungkin ada: 0 K, -273,15°C, atau -459,67°F.

Kalori

Satuan energi; kalori kecil (kal) memanaskan 1 g air sebesar 1°C, sedangkan Kalori makanan (kkal) sama dengan 1.000 kalori kecil.

Bilangan Mach

Rasio kecepatan suatu benda terhadap kecepatan suara di medium sekitarnya.

Tahun Cahaya

Jarak yang ditempuh cahaya dalam satu tahun di ruang hampa: sekitar 9,461 triliun kilometer.

Elektronvolt

Satuan energi sama dengan energi kinetik yang diperoleh elektron yang dipercepat melalui beda potensial 1 volt.