Focal Length using Distance Formula Calculator

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✖Focal Length 1 is the focal length of lens 1.ⓘ Focal Length 1 [f₁]			+10% -10%
✖Focal Length 2 is the focal length of lens 2.ⓘ Focal Length 2 [f₂]			+10% -10%
✖Width of Lens is the measurement or extent of lens from side to side.ⓘ Width of Lens [w]			+10% -10%

✖Focal Length of Lens is determined when lens is focused at infinity. Lens focal length tells us angle of view and how much of scene will be captured. The longer focal length, a narrower angle of view.ⓘ Focal Length using Distance Formula [F]

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Formula

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Focal Length using Distance Formula

Formula

`"F" = ("f"_{"1"}+"f"_{"2"}-"w")/("f"_{"1"}*"f"_{"2"})`

Example

`"3.541667m"=("0.40m"+"0.48m"-"0.2m")/("0.40m"*"0.48m")`

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Focal Length using Distance Formula Solution

STEP 0: Pre-Calculation Summary

Formula Used

Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2)
F = (f₁+f₂-w)/(f₁*f₂)
This formula uses 4 Variables

Variables Used

Focal Length of Lens - (Measured in Meter) - Focal Length of Lens is determined when lens is focused at infinity. Lens focal length tells us angle of view and how much of scene will be captured. The longer focal length, a narrower angle of view.
Focal Length 1 - (Measured in Meter) - Focal Length 1 is the focal length of lens 1.
Focal Length 2 - (Measured in Meter) - Focal Length 2 is the focal length of lens 2.
Width of Lens - (Measured in Meter) - Width of Lens is the measurement or extent of lens from side to side.

STEP 1: Convert Input(s) to Base Unit

Focal Length 1: 0.4 Meter --> 0.4 Meter No Conversion Required
Focal Length 2: 0.48 Meter --> 0.48 Meter No Conversion Required
Width of Lens: 0.2 Meter --> 0.2 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

F = (f₁+f₂-w)/(f₁*f₂) --> (0.4+0.48-0.2)/(0.4*0.48)

Evaluating ... ...

F = 3.54166666666667

STEP 3: Convert Result to Output's Unit

3.54166666666667 Meter --> No Conversion Required

FINAL ANSWER

3.54166666666667 ≈ 3.541667 Meter <-- Focal Length of Lens

(Calculation completed in 00.008 seconds)

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Created by Anirudh Singh

National Institute of Technology (NIT), Jamshedpur

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< 6 Focal Length of Lens Calculators

Lens Makers Equation

Go Focal Length 1 = (Lens Refractive Index/Medium Refractive Index-1)*(1/Radius of Curvature at Section 1-1/Radius of Curvature at Section 2)

Focal Length using Distance Formula

Go Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2)

Focal Length of Concave Lens given Image and Object Distance

Go Focal Length of Concave Lens = (Object Distance*Image Distance)/(Image Distance-Object Distance)

Focal Length of Convex Lens given Object and Image Distance

Go Focal Length of Convex Lens = (Object Distance*Image Distance)/(Object Distance-Image Distance)

Focal Length of Concave Lens given Radius

Go Focal Length of Concave Lens = -Radius/2

Focal Length of Convex Lens given Radius

Go Focal Length of Convex Lens = Radius/2

Focal Length using Distance Formula Formula

Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2)
F = (f₁+f₂-w)/(f₁*f₂)

What is a curved mirror?

A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward).

How to Calculate Focal Length using Distance Formula?

Focal Length using Distance Formula calculator uses Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2) to calculate the Focal Length of Lens, Focal Length using Distance Formula is the distance of the focus from the pole of the convex lens. the distance between the centre of a lens or curved mirror and its focus. Focal Length of Lens is denoted by F symbol.

How to calculate Focal Length using Distance Formula using this online calculator? To use this online calculator for Focal Length using Distance Formula, enter Focal Length 1 (f₁), Focal Length 2 (f₂) & Width of Lens (w) and hit the calculate button. Here is how the Focal Length using Distance Formula calculation can be explained with given input values -> 3.541667 = (0.4+0.48-0.2)/(0.4*0.48).

FAQ

What is Focal Length using Distance Formula?

Focal Length using Distance Formula is the distance of the focus from the pole of the convex lens. the distance between the centre of a lens or curved mirror and its focus and is represented as F = (f₁+f₂-w)/(f₁*f₂) or Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2). Focal Length 1 is the focal length of lens 1, Focal Length 2 is the focal length of lens 2 & Width of Lens is the measurement or extent of lens from side to side.

How to calculate Focal Length using Distance Formula?

Focal Length using Distance Formula is the distance of the focus from the pole of the convex lens. the distance between the centre of a lens or curved mirror and its focus is calculated using Focal Length of Lens = (Focal Length 1+Focal Length 2-Width of Lens)/(Focal Length 1*Focal Length 2). To calculate Focal Length using Distance Formula, you need Focal Length 1 (f₁), Focal Length 2 (f₂) & Width of Lens (w). With our tool, you need to enter the respective value for Focal Length 1, Focal Length 2 & Width of Lens and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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