Which type of wave is not reflected by the ionosphere?

d is the correct answer

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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answera compound;

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.