Question 14
Whenever we are dealing with sensory organs, we also need to understand the stimulus, in our case light and how it is measured. Lux is a photometric unit, while photons/cm^2/s and Watt are radiometric units. The difference is that one is a measure of the actual amount of light across all wavelengths, while the other is the light intensity a human eye perceives when taking its specific spectral sensitivity into account. Which statement(s) is/are correct?
A. We measure light in the unit Lux because this correctly takes the spectral sensitivity of the Drosophila eyes into account
B. We measure light in the unit Watt because the response of photoreceptors is thought to correlate with the amount of energy they absorb
C. It actually does not really matter which units we use, since we can easily convert any of these units into the others without even knowing the exact spectral content of the stimulus
D. We measure light in the unit photons/cm^2/s because the response of photoreceptors is thought to correlate with the amount of photons they absorb
Question 14
Whenever we are dealing with sensory organs, we also need to understand the stimulus, in our case light and how it is measured. Lux is a photometric unit, while photons/cm^2/s and Watt are radiometric units. The difference is that one is a measure of the actual amount of light across all wavelengths, while the other is the light intensity a human eye perceives when taking its specific spectral sensitivity into account. Which statement(s) is/are correct?
| A. | We measure light in the unit Lux because this correctly takes the spectral sensitivity of the Drosophila eyes into account | |
| B. | We measure light in the unit Watt because the response of photoreceptors is thought to correlate with the amount of energy they absorb | |
| C. | It actually does not really matter which units we use, since we can easily convert any of these units into the others without even knowing the exact spectral content of the stimulus | |
| D. | We measure light in the unit photons/cm^2/s because the response of photoreceptors is thought to correlate with the amount of photons they absorb |
