There is a _____ relation between absorption and frequency.

There is a _____ relation between absorption and frequency.

• A. Direct
• B. Inverse
• C. Constant
• D. No relation

Answer: (A)

A direct relation means that as frequency increases, absorption tends to increase as well. This happens because the energy of each photon is proportional to frequency (E = h f). When photons carry more energy, they’re better able to drive electronic transitions and interact with the material in ways that lead to absorption, so the overall absorption becomes stronger with higher frequency in the typical range considered. The other ideas would imply that absorption either gets weaker as frequency rises, stays the same, or has no connection at all, which doesn’t fit the common understanding in this context.

A direct relation means that as frequency increases, absorption tends to increase as well. This happens because the energy of each photon is proportional to frequency (E = h f). When photons carry more energy, they’re better able to drive electronic transitions and interact with the material in ways that lead to absorption, so the overall absorption becomes stronger with higher frequency in the typical range considered. The other ideas would imply that absorption either gets weaker as frequency rises, stays the same, or has no connection at all, which doesn’t fit the common understanding in this context.