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Telescope A had an aperture of 15 cm while telescope B that of 5cm how many times of light gathering power does telescope A have compared with telescope B
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Telescope A had an aperture of 15 cm while telescope B that of 5cm how many times of light gathering power does telescope A have compared with telescope B

User Mohsin AR
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12 votes

Answer:

Light gathering power is related to the area of the lens aperature:

Aa / Ab = (15 / 5)^2 = 9 since the area of an aperature is proportional to the square of the radius

User Inor
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