White Light:
- When a shadow is formed using white light, the color of the shadow will appear to be gray or black.
- This is because white light is a combination of all colors of light, and when an object blocks the white light, it absorbs all colors and reflects none. As a result, the shadow appears to be devoid of color, giving the impression of gray or black.

Green Light:
- When a shadow is formed using green light, the color of the shadow will appear to be green.
- This is because green light is a single color of light, and when an object blocks the green light, it absorbs all other colors and reflects only green. As a result, the shadow appears to be green.

Orange Light:
- When a shadow is formed using orange light, the color of the shadow will appear to be orange.
- This is because orange light is a single color of light, and when an object blocks the orange light, it absorbs all other colors and reflects only orange. As a result, the shadow appears to be orange.

When light falls on an object, three things can happen:
1. The light can be transmitted through the object, allowing us to see the object clearly.
2. The light can be reflected off the object, allowing us to see the object's color.
3. The light can be absorbed by the object, preventing it from reaching our eyes.

When an object blocks the path of light, a shadow is formed. The color of the shadow depends on the color of the light that is being blocked.

In the case of white light, which is a combination of all colors, the object absorbs all colors and reflects none, resulting in a gray or black shadow.

In the case of green light, the object absorbs all colors except green, which is reflected and gives the shadow a green color.

Similarly, in the case of orange light, the object absorbs all colors except orange, which is reflected and gives the shadow an orange color.

So, the color of the shadow formed using white light is gray or black, the color of the shadow formed using green light is green, and the color of the shadow formed using orange light is orange.

The shadow is always black because no light is reflected through these.