What is the wavelength of a photon of red light (nm) whose frequency is 4. 64 x 1014 hz?.

coil wire, increase current, put iron inside the coil

d) physical means can be used to separate the components of air.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.