Short-Question

Practical answers to complex questions

# What happens when you shine a red light on a blue object?

## What happens when you shine a red light on a blue object?

When you shine a perfectly red light light at a “bluish” object (Cyan) there is no red color to reflect, so you see black. The same holds true for all the other colors listed above and shown in the color wheel that a re exactly opposite of each other.

## Does blue reflect red?

Colour of objects Red light is the only light that is reflected from the shirt. If only blue light is shone onto a red shirt, the shirt would appear black, because the blue would be absorbed and there would be no red light to be reflected.

Does a blue solution absorb red light?

The solution absorbs the red and green wavelengths; however, the blue light is reflected and passes through, so the solution appears blue. This procedure takes place whenever an object displays visible color.

### What happens when you shine a red light on a yellow object?

Because yellow light is a mixture of red and green light, yellow will also reflect red and green light. This means that a yellow object will appear red under red light, and green under green light. Yellow does not contain blue, so it will appear black under blue light.

### What color is red under yellow light?

Coloured Objects Under Light Coloured Light

Light Colour Object Colour Appearance
Red Yellow Red
Blue Red Black
Blue Blue
Green Black

What happens if you shine Coloured light on objects?

When we look at an object and see its color, we are seeing all of the light that reflects off of that object. Red objects reflect red light, green objects reflect green light, and so on. But what happens to the rest of the colors that hit that object? They get absorbed!

#### What happens if you shine a red laser at a blue piece of paper?

Just red light is reflected. Even if you shine a red laser at a blue piece of paper, only red light is reflected.

#### What happens when you shine red light on a blue object?

So shining red light on a blue object would, in an ideal world, show it as black. In the real world no object is perfectly blue, it will reflect some light outside the blue. So if you want to simulate photo realism rather than a computer graphics look then you need to have it reflect some small percentage of other colours.

What happens when you shine a light on a red ball?

For example, if white light shines on a red ball, the ball reflects back mostly red light, and so we see red. Most of the greens and blues that are part of white light are absorbed by the ball so we cannot see them. Likewise, a blue book is reflecting the blue part of the white light spectrum.

## Why does a red ball not look blue?

It cannot look red unless there is red light coming to it from the light source. And it cannot look blue because the red ball absorbs blue light. So when we ask what color an object is, the answer is not simple – it depends on what color light we are using to see the object.