Definition of perk. intransitive verb. 1a : to thrust up the head, stretch out the neck, or carry the body in a bold or insolent mannerb : to stick up or out jauntily. 2 : to gain in vigor or cheerfulness especially after a period of weakness or depression âusually used with up he's perked up noticeably.
Quick Answer. Light travels at a considerably higher speed than sound. Light travels at a constant speed of 186,000 miles per second, but the speed of sound is only 761.2 mph.
Sound waves travel in. air at a speed of approximately 344 meters/second, while. electromagnetic waves travel at the speed of light. (300,000,000 meters/second). While mechanical waves need. something to move in e.g., air or water, electromagnetic waves. can travel in a vacuum. Another important characteristic of.