There are several objects that do not reflect red light equally well. Here are a few examples:
Black Objects: Black objects absorb most of the light that falls on them across the visible spectrum, including red light. As a result, they appear dark and reflect very little or no red light.
Transparent Objects: Transparent materials, such as glass or clear plastic, transmit light rather than reflecting it. While they may allow red light to pass through, they do not reflect it as efficiently as opaque objects.
Non-Red Objects: Objects that are not naturally red may reflect red light to a lesser extent. For instance, objects that primarily reflect or transmit other colors, like blue, green, or yellow, may have limited reflectivity in the red part of the spectrum.
Colored Pigments: Certain pigments used in paints, dyes, or inks may selectively absorb or reflect specific colors. For instance, if a pigment has a strong affinity for blue or green light, it may absorb most of the red light, resulting in poor reflection of red.
Matte Surfaces: Matte or rough surfaces scatter light in various directions rather than reflecting it uniformly. This scattering can lead to reduced reflection of specific colors, including red.
It's important to note that the reflectivity of an object can be influenced by various factors such as surface properties, texture, material composition, and the specific wavelengths of light involved. The examples provided above are general cases where red light reflection may be limited, but there can be variations depending on the specific circumstances and properties of the objects in question.