Tap a button, hear a click, and a moment is saved forever. But what actually happens inside that little box?
Here is the big secret: a camera does not capture things. It captures light.
In the next few steps you will follow one ray of light on its journey — from a sunflower, through a lens, onto a sensor, and into a photo on a screen.
The sun (or a lamp) sends out light. That light hits a sunflower and bounces off it in every direction. Some of those bounced rays fly straight into your eye — and some fly into a camera.
That is why you cannot take a photo in a completely dark room: there is no light to bounce!
Tap the pictures in the order light travels.
The rays arriving at the camera are spread out and messy. The lens is a curved piece of glass that bends every ray so they all meet neatly at one spot inside. We say the picture is in focus.
Fun fact: because of the bending, the picture lands inside the camera upside down! The camera flips it back for you. 🙃
Slide to move the lens until the rays meet exactly on the sensor.
Inside the camera is a tiny door called the shutter. It is normally shut. When you press the button, it snaps open and closed — often faster than you can blink. That is the click sound!
While the door is open, light pours in. How long it stays open really matters:
At night there is very little light, so the shutter must stay open longer to collect enough. If your hands wobble even a little during that long open time, the picture smears. That is why photographers use a tripod! 📐
You have met all the parts of the journey so far. Put them in the right order — tap a card, then tap the slot it belongs in (or drag it across).
The sensor is a flat chip covered in millions of tiny light-counting squares called pixels. Each pixel asks one simple question: how much red, green and blue light landed on me?
It writes the answers down as numbers. A photo is really a giant grid of numbers — and a screen turns those numbers back into colours.
🟥 red 240 🟩 green 90 🟦 blue 30 ➡️ that pixel is orange!
You be the sensor. Colour the pixels to make the flower appear. Tap a pixel to fill it in.
Only 64 pixels here — a real phone camera has over 12 million. That is why photos look so smooth!
The camera's little computer takes all those numbers, tidies up the colours, squeezes the file smaller so it does not hog space, and saves it as a photo file. Then you can see it, print it, or send it to Ah Ma. 👵
Quick check: Which part of a camera actually records the picture?
Next time you hear that click, you will know exactly what just happened inside.
Take one photo of the same toy in a bright room and one in a dim room. Look closely: the dim one is usually blurrier or grainier — because the camera had to work hard to collect enough light. You just spotted the shutter at work!
Great work, photographer. 📷✨