What best discribes the relationship between wavelength and frequency in a electromagnetic wave

The higher the frequency, the shorter the wavelength

Explanation:

All light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i just learnt this recently but i need to look through my notes again