Chapter 28, Problem 30A

To determine

The color of yellow cloth appear if it is illuminated with sunlight, yellow light, and the blue light.

Explanation of Solution

Introduction: 

When an object is illuminated, some of the wavelengths of light is absorbed and some are reflected.

Explanation: 

The light is reflected from a smooth or flat surface of an object. Almost all the surfaces of an object reflect the light. The human eye receives the reflected color that is same as that of the object’s color. When the sunlight strikes on the yellow cloth it reflects only yellow color that is perceived by the human eye. When yellow light strikes on the yellow cloth that reflects the yellow color. When the blue light strikes on the yellow cloth, the black color is perceived by the human eye because all the light absorbed by the yellow cloth and this results in black appearance. 

Conclusion: 

Sunlight reflects all the visible light. So, the yellow cloth appears as yellow. The yellow light reflects on a yellow object and appears as yellow. But when the blue light strikes the yellow cloth it absorbs all the light and appears black.