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If the distance from the focus is 2 mm and the distance from the directrix is 0.5 mm then what is the value of eccentricity?

If the distance from the focus is 2 mm and the distance from the directrix is 0.5 mm then what is the value of eccentricity? Correct Answer 4

Eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. Therefore, by definition, e = 2 ÷ 0.5 = 4. Hence the conic section is called as hyperbola.

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