10 uses ofmagnifying glassin laboratory

A pair of binoculars is like a telescope for each eye. Spectacles or eyeglasses also use lenses to correct a person's vision.

5.4: How to Measure With Micrometer is shared under a CC BY-NC-SA license and was authored, remixed, and/or curated by LibreTexts.

10 uses ofmagnifying glass

Lines under the horizontal zero line show us the half-millimeters. When you can not see the half-millimeter line it means that your dimension is between 4.0 and 4.5 mm. If we can see the half mm line, it means that the dimension is between 4.5 and 5 mm.

Magnifyinglens concave or convex

A micrometer is an essential tool for taking precise measurements. It has a precision of 0.01 mm and if you ever aspire to make something with tight tolerance you will probably need to use it. We will have a look at how to use a traditional analog micrometer and how to read the dimension correctly.

This graduation shows you the tenths and hundreds of a millimeter. It is divided into 50 graduations. There fore each graduation equals 0.01 mm. We will simply have a look at which graduation lines up with the horizontal zero line. For this part, we can see that the number is 29. Because we can not see the half-millimeter line we just add this number to 4.0 mm. Therefore our final dimension is 4.29 mm.

"The evidence indicates that the use of lenses was widespread throughout the Middle East and the Mediterranean basin over several millennia". The earliest explicit written evidence of a magnifying device is a joke in Aristophanes's The Clouds from 424 BC, where magnifying lenses to ignite tinder were sold in a pharmacy, and Pliny the Elder's "lens", a glass globe filled with water, used to cauterize wounds. (Seneca wrote that it could be used to read letters "no matter how small or dim"). A convex lens used for forming a magnified image was described in the Book of Optics by Ibn al-Haytham in 1021. After the book was translated during the Latin translations of the 12th century, Roger Bacon described the properties of a magnifying glass in 13th-century England. This was followed by the development of eyeglasses in 13th-century Italy.

What is magnifying glassvsmagnifying glass

The number of lines on the top of the horizontal zero line tells you the millimeters. We can see 4 lines for this measurement. Meaning our measurement is over 4 mm.

What is magnifying glassused for

A magnifying glass is a lens through which can be used to make things appear bigger, so you can see them better. It is used in many applications and manual operations, e.g., for examining postage stamps in philately.

Reading the micrometer can be tricky when you are not used to it. To mitigate any reading error, it is helpful to take a rougher measurement with calipers first to see what dimension you are aiming for.

What is magnifying glassfor reading

The magnifying glass consists of a piece of convex-shaped glass or plastic. It has to be held at the right distance between the eye and the object for the object to be in focus. The magnifying glass usually comes with a handle. A telescope is a more advanced kind of magnifying glass and consists of at least two glass lenses.

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In the video, I am showing how to take the measurement and also talking a little bit about how the micrometer is made. So this could be helpful for understanding this device a little better.

Video: In this video, we are looking at a micrometer. This is a device for taking precise measurements. It has a precision of 0,01 mm and is essential in any machine shop. I am quickly showing how it is built and how it works as well as how to take a measurement with it. I hope this is helpful.