Final answer:
An object appears red when seen through red glass and black when seen through blue glass due to absorptive and reflective characteristics.
Step-by-step explanation:
Answer:
When an object appears red when seen through red glass and black when seen through blue glass in daylight, it is because of the object's absorptive or reflective characteristics. The color of an object is defined by the wavelengths of light it absorbs and reflects.
A red object appears red because it absorbs all wavelengths of light except for red, which it reflects. When seen through a red glass, the object appears red because the red glass allows red light to pass through while blocking other colors. When seen through a blue glass, the object appears black because the blue glass absorbs most of the wavelengths of light, including red light.