Question

In order to change the color of light, you must change

only the frequency of the light
only the wavelength of the light
either the frequency or the wavelength of the light
neither the frequency nor the wavelength of the light

Answer 1

HELP PLEASE IM TAKING AN EXAM AND I NEED HELP

Answer 2

Unfortunately we can not help on exams or quizzes it is against the rules :(

Answer 3

Most people probably would say that a light's color is always dependent on its wavelength. But this is true only if the light is traveling through one medium, such as air. If the light enters another medium, such as glass, then the wavelength will change, even though the color will remain the same.

Rather, the color always is dependent upon the light's frequency, which is the number of waves of the light that pass a given plane in space per second. If the color of the light always was dependent upon its wavelength, then its color would change when it enters a medium with a different index of refraction. But it does not. So, you're answer would be "A".