I found an answer from www.ck12.org

Mirror **Formula** and **Magnification** | CK-12 Foundation

Feb 18, 2016 **...** This **physics** text was created using CK-12 resources to be seed content for a
complete ... Where \begin{align*}f\end{align*} is the focal **length** of the mirror, ... a)
the location of the **real** image, and b) the **magnification** of the image. ... c) Use the
mirror/**lens equation** to calculate \begin{align*}v\end{align*}.

For more information, see Mirror **Formula** and **Magnification** | CK-12 Foundation

I found an answer from www.quora.com

What is the significance of the numerical aperture of a **microscope** to ...

Numerical aperture is not directly related to **magnification**. If you have two
objectives **with** the same **magnification** but different numerical apertures, the
**image** in the eyepiece ... As a newbie to **microscopes**, I have been trying to **look**
at **hair under** a ... In amateur astronomy we take the objective's **diameter** in **mm**,
multiply it by ...

For more information, see What is the significance of the numerical aperture of a **microscope** to ...

I found an answer from www.britannica.com

https://www.britannica.com/science/biological-rhythm 2021-04-03 ...

Firefly light is a cold light, **with** approximately **100** percent of the energy given off
as light and ... Discover the ways to **measure** a forest and **calculate** the biomass
of the ... (A) The bacteria recognize the root **hairs** and begin to divide, (B) entering
the root ... Otto von Bismarck https://cdn.britannica.com/72/9072-004-**9E20D5DD**/
...

For more information, see https://www.britannica.com/science/biological-rhythm 2021-04-03 ...

I found an answer from www-ssrl.slac.stanford.edu

The Scale of Things – Nanometers and More

10-**20** μm. Head of a pin. 1-2 **mm**. Quantum corral of 48 iron atoms on copper
surface ... Corral **diameter** 14 nm. **Human hair**. ~ 60-120 μm wide. Ant. ~ 5 **mm** ...
**100** nm. 1 micrometer (μm). 0.01 **mm**. 10 μm. 0.1 **mm**. **100** μm. 1 millimeter (**mm**)
... incidentally formed – engineered nanomaterials **with dimensions** of less than
**100**.

For more information, see The Scale of Things – Nanometers and More

Formula: \text{ magnification }= \frac{\text{Average observed width }}{\text{ real width }}

\text{ real width }= \frac{\text{Average observed width }}{\text{ magnification }}

Given that

Average of width of the hair = 3.5 mm

Magnification m = 100

Thickness of the hair = ?

Hence, real thickness of the hair = \frac{3.5}{100} mm

= 0.035 mm