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.
Contrary to what some think, thunder is not caused by the lightning bolt âbreaking the sound barrierâ. If this were true, then every time we turned on a light in the house we would hear a sonic boom! The speed of light is about 186,282 miles per second. The speed of sound is about 0.211 miles per second at sea level.