Question

найдите фокусное расстояние оптическую силу собирающей линзы, если известно что изображение предмета помещенного на расстоянии 30 см от линзы получается по другую сторону линзы на таком же расстоянии от нее

Answer 1

1/F=1/d+1/f=2/d

F=d/2

D=1/F=2/d

Answer 2

Finding the Focal Length of a Converging Lens

To find the focal length of a converging 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 image distance from the lens - u is the object distance from the lens

In this case, we are given that the image of an object placed 30 cm from the lens is formed on the other side of the lens at the same distance of 30 cm.

Let's calculate the focal length using the lens formula:

1/f = 1/v - 1/u

Since the image distance (v) and object distance (u) are both 30 cm, we can substitute these values into the formula:

1/f = 1/30 - 1/30

Simplifying the equation:

1/f = 0 - 0

Since both terms on the right side of the equation cancel out, we are left with:

1/f = 0

To solve for f, we can take the reciprocal of both sides of the equation:

f = 1/0

However, dividing by zero is undefined, which means that the focal length cannot be determined based on the given information.

Unfortunately, without additional information or constraints, it is not possible to calculate the focal length of the lens in this scenario.

Please let me know if there's anything else I can help you with!