The natural agent that stimulates sight and makes things visible.
The definition of the speed of light in a vacuum is 300,000,000 meters/sec, or 186,000 miles/sec.
An electronic device that senses light.
Something that is affected by light.
Answer: emitting or reflecting light
Something that is affected by light.
to light up...
If you said to someone, "Can you shed light on this?" it means "Can you explain this?"
A flash or beam of light
The number of years in a second... by definition!
c=3.8x10^8
Radiant energy
A radiance or brilliance of light