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Discover Questions

Why would the absorption spectrum of each element have lines in the same places as in the emission spectrum? In an isosceles triangle, each base angle has half the measure of the vertex angle. Find the measure of each bass angle.? Why is Mjaarten's dad 1? Astronomy: Are the Van Allen belts, the Ionosphere, and the Heaviside layer all different names for the same thing? A) what is the wavelength of a radio wave that operates at 98.1MHz?
b) what is the period of this wave?