In a transmission experiment, 100 quanta of light at 400 nm are incident and 80 quanta are transmitted. How many quanta did rhodopsin absorb?

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Multiple Choice

In a transmission experiment, 100 quanta of light at 400 nm are incident and 80 quanta are transmitted. How many quanta did rhodopsin absorb?

Explanation:
When light interacts with rhodopsin, the incoming photons are either transmitted or absorbed (ignoring reflections and other losses). The number absorbed equals the incident light minus what passes through. Here, 100 quanta arrive and 80 quanta are transmitted, so the absorbed quanta are 100 − 80 = 20. Those 20 absorbed quanta provide the energy to change rhodopsin chemically, initiating the visual signal.

When light interacts with rhodopsin, the incoming photons are either transmitted or absorbed (ignoring reflections and other losses). The number absorbed equals the incident light minus what passes through. Here, 100 quanta arrive and 80 quanta are transmitted, so the absorbed quanta are 100 − 80 = 20. Those 20 absorbed quanta provide the energy to change rhodopsin chemically, initiating the visual signal.

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