Which of the following is a disadvantage of absorption filters?

Absorption filters are designed to absorb specific wavelengths of light while allowing others to pass through. One of the main disadvantages of these filters is their susceptibility to damage. They can be scratched easily due to their physical characteristics, which can impact their optical performance and clarity. Additionally, they are often sensitive to heat and ultraviolet (UV) radiation, which can degrade the material over time and reduce their effectiveness. This tendency makes them less durable compared to other types of filters, thus necessitating careful handling and storage which could be cumbersome in certain applications.

The other options do not accurately reflect the characteristics of absorption filters. For example, while weight can be a factor in some filter designs, the majority of absorption filters are not particularly heavy. Clarity can vary under different conditions, and maintenance requirements differ based on the type of filter and its usage, with absorption filters often requiring more attention than options that claim to have no maintenance at all.