Question

5. Фокусное расстояние линзы 75 см. Определите оптическую силу этой линзы.​

Answer 1

Дано:

F = 75 cм = 0,75 м

Найти:

D - ?

Решение:

D = 1/F

D = 1/0,75 ≈ 1,3 дптр

Ответ: D ≈ 1,3 дптр

Answer 2

Determining the Optical Power of a Lens

To determine the optical power of a lens, we need to use the formula:

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

In this case, the focal length of the lens is given as 75 cm. We can use this information to calculate the optical power.

Calculation

Using the formula mentioned above, we can calculate the optical power of the lens as follows:

P = 1 / f

P = 1 / 75 cm

Converting centimeters to meters:

P = 1 / 0.75 m

Simplifying the expression:

P = 1.33 diopters

Therefore, the optical power of the lens with a focal length of 75 cm is 1.33 diopters.

Please note that the calculation assumes a thin lens and uses the simplified formula for optical power.