In the process of making a rainbow, light enters the water droplet at location 1 and exits at location 3. Which of the following choices correctly identifies the sequence of interactions that produce the rainbow?

Figure shows a simple cathode-ray tube. a beam of particles, emitted by the cathode, strikes the centre of the screen.a. why the cathode must be heated? b. what is the principal energy change that occurs when the beam strikes the screen? c describe and explain what you would expect if the two deflecting plates g and h were connected to an alternating voltage supply