Question

Фокусное расстояние от линзы 200 мм. Вычислите оптическую силу линзы.

Answer 1

Оптическая сила линзы и фокусное расстояние обратно пропорциональны:
D=1 / F ( F-фокусное расстояние=0,2м ( в системе СИ) .
D=1 / 0,2=5дптр. ( диоптрий).

Answer 2

Calculation of the Optical Power of a Lens

To calculate the optical power of a lens, we can use the formula:

Optical Power (P) = 1 / Focal Length (f)

Given that the focal length of the lens is 200 mm, we can calculate the optical power as follows:

P = 1 / 200 mm

To convert the focal length from millimeters to meters, we divide by 1000:

P = 1 / 0.2 m

Simplifying the equation, we find:

P = 5 diopters (D)

Therefore, the optical power of the lens with a focal length of 200 mm is 5 diopters (D).

Please note that the optical power of a lens is measured in diopters (D), which is the reciprocal of the focal length measured in meters.