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Physics, 09.11.2020 20:50 iPlayOften3722

a cross section of a parabolic reflector as shown below. a bulb is located at the focus the opening at the focus AB is 12cm what is the diameter of the opening CD 8cm from the vertex?


a cross section of a parabolic reflector as shown below. a bulb is located at the focus the opening

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a cross section of a parabolic reflector as shown below. a bulb is located at the focus the opening...
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