Question

Главное фокусное расстояние линзы 10 см.. предмет находится на расстояние 12см. от линзы . найти расстояние от изображения до линзы

Answer 1

1/F=1/d+1/f,  1/f=1/F-1/d,   1/f=(d-F)/Fd,  f=Fd/d-F.  f=120/2=60см

Answer 2

Calculation of the Distance from the Image to the Lens

To find the distance from the image to the lens, we can use the lens formula:

1/f = 1/v - 1/u

Where: - f is the focal length of the lens, - v is the distance of the image from the lens, and - u is the distance of the object from the lens.

Given that the focal length of the lens is 10 cm and the object is located at a distance of 12 cm from the lens, we can substitute these values into the lens formula to find the distance from the image to the lens.

1/10 = 1/v - 1/12

To solve this equation, we can rearrange it as follows:

1/v = 1/10 + 1/12

Now, let's calculate the value of 1/v:

1/v = (12 + 10) / (10 * 12) = 22 / 120 = 11 / 60

To find the value of v, we can take the reciprocal of 1/v:

v = 60 / 11 ≈ 5.45 cm

Therefore, the distance from the image to the lens is approximately 5.45 cm.