Sixth grade science homework, make a constellation projector, and find a way.

I plan to turn my mobile phone into a 40-inch projector, and I want to try it today. success

This is not much, here is the production process!

Materials and tools: at least one mobile phone and one box; High permeability magnifying glass,

Scotch tape.

experimental procedure

1.

A magnifying glass is placed on the narrower side of the shoe box,

Use a pencil along the edge of the magnifying glass on the shoes.

Draw the outline of a magnifying glass on the box.

Pick up a magnifying glass and use a carving knife to hollow out the shoe box along the drawn circular outline.

Dig a hole.

2.

Put a magnifying glass on the hole,

And tightly adhered with adhesive tape paper,

Make a magnifying glass and a shoe box.

Connect into one.

Open the paper clip and make it into a

"

number; amount; how many; how much

"

Zigzag, with both ends upturned as hooks, inserted into shoes.

In the box, there are only hooks with two ends facing up, which are used to place items.

3.

Put the mobile phone on the paper clip hook of the shoe box and fix it.

Simple projector

It's over.

Open the phone screen and adjust the projection.

experimental result

You can make a simple projector with these simple materials, and the principle is the same as amplification.

The mirror is related to it. The magnifying glass is a convex lens. Using the imaging law of convex lens, the mobile phone is placed in

Beyond the focus of the magnifying glass, what is displayed on the whiteboard through the magnifying glass will be an inverted amplifier.

Big image.

If the shoe box is close to the wall, the projection brightness is acceptable, but the projection area is small. If the shoe box is separated

The farther the wall is, the larger the projection area is, but the brightness is reduced and the picture cannot be seen clearly. Lead to projection

The picture is a mirror image, so you can't watch it. You can put a mirror under the phone and put the screen

The bright light of the curtain is reflected into the magnifying glass in front of the shoe box, which can correct the left and right mirror images.

Conclusion: The experimental effect is not very good, and the painting surface projected on the wall is blurred. If you want to do it,

To see pictures and videos clearly, the requirements are relatively high, the magnification of a magnifying glass is large, and

It should be used in dark places. Only in this way can we understand projection imaging.