Electromagnetic waves interact with the red and white stripes of an American flag in different ways. The white stripes reflect most of the light waves that hit them, giving them their bright appearance. This is because white objects reflect all wavelengths of light equally, so they appear white to the human eye. The red stripes, on the other hand, absorb most of the incoming light waves and reflect only the red wavelengths. This selective reflection is what gives the red stripes their distinctive color.
If an electromagnetic wave were to interact with a solid black object, most of the light waves would be absorbed rather than reflected. Black objects tend to absorb all wavelengths of light, which is why they appear dark to the human eye. The absorbed light energy is converted into heat, which is why black objects can feel warmer to the touch than lighter colored objects.
In summary, the red and white stripes of an American flag interact with electromagnetic waves by reflecting and absorbing different wavelengths of light. The white stripes reflect all light waves, appearing bright, while the red stripes selectively reflect red wavelengths. In contrast, a solid black object absorbs most light waves, appearing dark and potentially feeling warmer due to the conversion of absorbed light energy into heat.