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LightMeter

Glass was developed by the Romans in the first century. Since then, scientists have been trying to magnify objects. No-one knows who first invented the microscope, but there have been key stages in their development:

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Lux Meter

1590s: Dutch spectacle maker Janssen experimented with putting lenses in tubes. He made the first compound microscope. None of these microscopes have survived, but they are thought to have magnified from ×3 to ×9.

Anyways, the app is free but has ads (less annoying about ads than some apps I've seen). It's on the Google Play Store and it's called "💡 Lux Light Meter Free" by "Doggo Apps". I'm not sure what apps Apple has, but I'm sure there is something similar.

Lightmeter app

The optical quality of lenses increased and the microscopes are similar to the ones we use today. Throughout their development, the magnification of light microscopescloselight microscopeDevice that uses visible light and a series of lenses to produce an enlarged image of an object. has increased, but very high magnifications are not possible. The maximum magnification of a light microscope is around x2000. However, most of the microscopes that are used in schools can only reach x400 magnification.

Lux meter for LED lights

I was contemplating getting a light measurement tool/device but didn't feel like spending money so I decided to check if there was an app for it, and there is. The app measures light intensity in lux or footcandles using your phone's light sensor (YMMV). I'm not extremely knowledgeable in the science behind it, but the measurement does change depending on how much light my phone's exposed to. According to a Google search, it seems like 1000 FC (footcandles) is the "minimum" for high light plants like succulents, with some sources saying 3000-10,000 FC is good for them.

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Light and electron microscopes allow us to see inside cells. Plant, animal and bacterial cells have smaller components each with a specific function.

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1650s: British scientist, Robert Hooke (also famous for his law of elasticity in Physics) observed and drew cells using a compound microscopeclosecompound microscopeA microscope in which the lens is close to the sample being magnified..

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In most microscopes, there is a choice of objectives to use. Magnification can therefore be varied, according to the size of the specimen to be viewed and the level of detail required.

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The magnification of a lens is shown by a multiplication sign followed by the amount the lens magnifies. So a lens magnifying ten times would be ×10. The total magnification of a microscope is:

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We need microscopes to study most cells. Microscopes are used to produce magnified images. There are two main types of microscope:

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Late 1600s: Dutch scientist Antonie van Leeuwenhoek constructed a microscope with a single spherical lens. It magnified up to ×275.