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.
Space is a very quiet place. But sound doesn't have to move through air-it can just as easily move through water, or through metal wires. In fact, sound moves faster through water than it does through air. But whether in air or in water, sound moves much more slowly than light does.