How to make colored shadows

Placed on the three vertices of a regular triangle centered on the person.

In this way, the three lamps create three shadows.

The shadow created by blue is a mixture of yellow and red.

Similarly. The shadow created by yellow is a mixture of yellow and blue.

The shadow created by red, etc., is a mixture of yellow and blue.

Through these three lights, shadows of seven colors can be created: cyan, purple, yellow, blue, red, green, and black. When one of the three rays is blocked, the other two rays mix to create cyan, purple, or yellow shadows.

When you put your finger into the yellow light, you will see shadows of two colors: one is red and the other is green. This is because the yellow shadow is produced by mixing red and green rays, and when the finger blocks the red rays coming from one direction, only the green rays cast on the wall to form a green shadow; When the finger blocks the green light coming from the other direction, only the red light casts a red shadow on the wall

In fact, it is to add a few background colors, and you can mix the color Follow-up question: Can you tell me about the steps, I don't understand a little, it's better to have a picture! I'll give you a bounty :

In the darkroom, 2 light bulbs are used as light sources, and the surface of one light bulb is coated with red cellophane. When a person stands in a dark room and shines this light source on his hand, a green shadow will appear on the white screen. If you can wrap the bulb with a variety of different colors of cellophane and shine it on your hand from different angles, the shadow on the screen will form a colored one (don't have too many types of shadows, don't be like sunlight, then the final light emitted is white, which will cause the shadow to still be black) Follow-up:

You still explain the three lamps you started with, the language is easy to understand, it is better to list the steps, please: 3 lamps with masks, red, blue, yellow negatives, a dark room Operation: Turn on the power so that the lights of the three lamps illuminate the screen at the same time.

Standing in front of the screen, the viewer can see three shadows of different colors. Principle: White light is a composite light of different wavelengths, which can be decomposed into seven colors of monochromatic light waves through a prism or grating.

This exhibit is designed according to the principle of synthesis and decomposition of light waves. The exhibits are composed of special lamps that emit red, green, and blue colors, and the light of the three lamps shines on the large white screen at specific angles, presenting a synthetic white light. When the audience stands in front of the big screen, three shadows appear on the screen.

Since the specific angle of the light makes each shadow composed of two lights, therefore, the three shadows appear in different colors, i.e., cyan, purple, and yellow. : Probably not.

1. Turn on the power so that three lights of different colors illuminate the wall at the same time. Standing on the wall, the experimenter can appear three shadows of different colors.

2. Paint the shadows in colored ......[Dirt.

It seems that the man in black in the happy base camp is a guest and talks about this principle.