Question

what is light speed and define speed

Answer 1

Hi dude..... Gud mrng...
SPEED OF LIGHT:
speed of light. The distance light can travel in a unit of time through a given substance. Light travels through a vacuum at about 186,000 miles, or 300,000 kilometers, per second. (See E = mc2, electromagnetic waves, relativity, and twin paradox.)

SPEED:
the rate at which someone or something moves or operates or is able to move or operate.
Hope this may help u....

Answer 2

The distance travelled by an object in per unit time..... Is called speed....
Light speed is 299 792 458 m/s.....