With light of wavelength 507 nm hitting the retina, is this a greater or lesser threshold for rods to respond?

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Multiple Choice

With light of wavelength 507 nm hitting the retina, is this a greater or lesser threshold for rods to respond?

Explanation:
Rods are most sensitive to greenish light, with peak sensitivity near 507 nm. The threshold is the minimum light level needed to provoke a detectable response. When a photoreceptor is near its peak sensitivity, it requires fewer photons to reach that threshold. So at 507 nm, the rods need less light to respond, meaning the threshold is lower (less light is required). As light moves away from the peak sensitivity, the threshold would rise.

Rods are most sensitive to greenish light, with peak sensitivity near 507 nm. The threshold is the minimum light level needed to provoke a detectable response. When a photoreceptor is near its peak sensitivity, it requires fewer photons to reach that threshold. So at 507 nm, the rods need less light to respond, meaning the threshold is lower (less light is required). As light moves away from the peak sensitivity, the threshold would rise.

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