需要围绕“what colour does black and yellow make”这一主题写一篇英文文章，以下是文章内容：
What colour does black and yellow make?
Have you ever wondered what happens when you mix black and yellow together? The answer might surprise you. While many people might assume that black and yellow would create a shade of green, the actual result is quite different. This intriguing question delves into the fascinating world of colour theory and the science behind mixing pigments.
Understanding Colour Theory
To understand why black and yellow don’t create green, we need to delve into the basics of colour theory. According to this theory, all visible light is made up of different wavelengths, which our eyes perceive as different colours. When we mix two or more primary colours, the resulting hue depends on the wavelengths of light they produce.
In the case of black and yellow, black is the absence of light, while yellow is a primary colour with a wavelength of approximately 570-590 nanometers. When these two are mixed, the resulting hue is determined by the wavelengths of light they reflect or absorb.
The Science Behind Mixing Black and Yellow
When black and yellow are mixed, the black pigment absorbs all wavelengths of light, while the yellow pigment reflects light with a wavelength of approximately 570-590 nanometers. As a result, the mixture absorbs more light than it reflects, leading to a darker shade of yellow. This is why black and yellow mixed together do not create green but rather a darker shade of yellow.
Practical Applications
The knowledge that black and yellow mixed together do not create green has practical applications in various fields. For example, in the world of art, artists may choose to mix black and yellow to create a rich, dark yellow hue. Additionally, in graphic design, the combination of black and yellow can be used to create striking contrasts and focal points in visual compositions.
Conclusion
In conclusion, when it comes to the question of what colour does black and yellow make, the answer is not green but a darker shade of yellow. This intriguing phenomenon highlights the fascinating world of colour theory and the science behind mixing pigments. By understanding these principles, we can appreciate the beauty and complexity of the visual world around us.
