Question

D=24cmf=F+8F=?1/F=1/d+1/f​

Answer 1

Ответ:

F=23см=0,23м

Объяснение:

Answer 2

It seems like you have an equation involving distances and focal lengths related to lenses. Let me break down the given equation:

1. D = 24 cm: This is the distance between an object and a lens (D represents the object distance).
2. F: This represents the focal length of the lens.
3. 1/F = 1/d + 1/f: This is the lens formula, which relates the object distance (d), the image distance (f), and the focal length (F) of a lens.

To find the image distance (f) for the given object distance (D = 24 cm) and focal length (F), we can use the lens formula:

1/F = 1/d + 1/f

Plugging in the values:

1/F = 1/24 + 1/f

Now, let's solve for 1/f:

1/f = 1/F - 1/24

To add these fractions, you'll need a common denominator, which is 24F:

1/f = (24 - F) / (24F)

Now, you want to find the image distance (f), which is the reciprocal of 1/f:

f = 24F / (24 - F)

To find F + 8F, you simply add 1F to 8F:

F + 8F = 9F

So, the expression F + 8F is equal to 9F.

If you need a numerical result, you would need to know the specific value of the focal length (F) to calculate 9F.