Please help me, theres more than 1 pictures btw

1.D   2.Infaret light waves the bottom answer is Wavelength and frequency are two such characteristics. The relationship between wavelength and frequency is that the frequency of a wave multiplied by its wavelength gives the speed of the wave, as we will see below. That's all I know. Hopwfully it helps.

its c its is a mixture of gases

i will answer your question if you answer mine