he speed of light in a vacuum can be reported as  ____________________ in a second.

The speed of light in a vacuum isGroup of answer choices768 km per hour300,000 km per second186,000 miles per hour.343 meters per secondnot given.

speed of light

The time taken by a light ray to travel a distance of 3 cm in vacuum is [Take speed of light in vacuum as 3 × 108 m/s]  Only one correct answerA.10–8 sB.108 sC.10–10 sD.1010 s

Fill in the blank with the correct word.Do you know that light travels at a/an …………… of 186000 miles a second?

11.If the index of refraction for water 1.33 and the speed of light in vacuum is 3 × 108 m/s.ABCD