UV (Ultra Violet) is invisible light. Human eyes are able to see only parts of the light spectrum, as the ear is able to hear some sound frequencies. Human eyes are able to identify light with 750,000,000,000,000 to 429,000,000,000,000 of frequencies. Human ears are able to hear 20 to 20,000 cycles per second. Listen to 150 cycles per second Listen to 500 cycles per second Listen to 1000 cycles per second Listen to 5000 cycles per second Listen to […]
