YOUR FIRST MICROSCOPY DISCOVERY

What is microscopy
—and why use it?

Look closer. Find a signal.
Discover what it can tell you.

No prior knowledge needed · Explore at your pace
Free · No account or AI connection required

Microscopy uses instruments to investigate structures and properties too small for ordinary vision to reveal.

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Three ideas to start with

The interactive journey appears when it is ready. You can also learn the essentials here and read the examples and scientific sources below.

Compare a familiar size

Our example hair is 80 micrometres (µm) wide. About ten 8 µm red blood cells, forty 2 µm bacteria placed end to end, or eight hundred 100 nanometre (nm) viruses fit across that width. These are representative examples; sizes vary. One millimetre is 1,000 µm, and one µm is 1,000 nm.

Follow a signal into an image

In transmitted-light microscopy, light passes through a specimen and lenses form an image. Closing the only illumination source’s shutter makes this teaching model’s detector dark. Adjusting focus can sharpen an illuminated image, but it cannot restore missing light. Magnification enlarges an image; resolution concerns the detail you can distinguish.

Choose a method for your question

Light microscopy can reveal cells or labelled structures. SEM investigates surface appearance, while conventional TEM forms a projection through a thin specimen. AFM uses a scanning tip to map surface heights. Optical profilometry uses reflected light to infer surface height. Each method has limits, and an illustrative image is not a calibrated measurement.

Continue to Magnification versus Resolution

CHANGE YOUR PERSPECTIVE

How small is small?

Select an object. Compare its example size with the same strand of hair.

A strand of hair3D TEACHING MODEL

Step into the small.

Load the interactive 3D view to rotate models and follow a signal.

80 µmexample hair width

3D loads when requested. Every explanation and activity also works without it.

Each model is enlarged separately. Example sizes vary in nature. This is not one continuous microscope zoom.

JANA / YOUR DISCOVERY GUIDEPreset guidance · no live AI

Start with something familiar.

Small units, made simple1 mm = 1,000 µm1 µm = 1,000 nm

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WHY IT MATTERS

Small clues. Real questions.

HEALTH & BIOLOGY

What does a cell look like?

Compare shape and structure, or follow selected features using fluorescent labels.

MATERIALS & ENGINEERING

Why did a surface fail?

Investigate cracks, particles or wear. An image can guide a question; it does not explain every cause.

MANUFACTURING & RESEARCH

Was this feature made correctly?

Measure dimensions and surface height with a method and calibration suited to the task.

About the models, scientific sources and accessibility

These are original schematic teaching models. Organism dimensions are representative, not measurements of a real specimen. Colours are chosen for clarity. Models are enlarged separately; geometry, component spacing and moving signal markers are not to scale. Their motion does not represent the speed of light, electrons or biological activity.

The brightfield detector uses an illustrative absorption pattern and a symmetric blur to explain defocus, not a quantitative optical model. The specimen pattern and detector share the same features; image orientation is kept the same for comparison. It omits noise, diffraction, aberrations and other light sources. The AFM and profiler maps are synthetic height fields; SEM contrast is illustrative, not a measured height map. The TEM view is a teaching projection. The profiler reference arm is not drawn.

Motion starts only when you request it. Rotation buttons and keyboard-accessible controls provide alternatives to dragging. If 3D is unavailable, the descriptions, synthetic image controls and understanding checks remain usable. JANA’s guidance here is authored text; it does not send questions or audio to AI.