* Speed of light: 300,000 kilometers per second (km/s)

* Seconds in a day: 24 hours * 60 minutes/hour * 60 seconds/minute = 86,400 seconds

Calculation:

* Distance traveled in a day = Speed of light * Seconds in a day

* Distance traveled in a day = 300,000 km/s * 86,400 s

* Distance traveled in a day = 25,920,000,000 km

Therefore, light travels approximately 25.92 billion kilometers in one day.