3 ms·
Very small numbers of photons (1) are required to trigger rhodopsin cycle. So primary receptor itself is very very VERY sensitive.
by arpa 7y ago
Very small numbers of photons (1) are required to trigger rhodopsin cycle. So primary receptor itself is very very VERY sensitive.
- tofof 7y agoTo be clear, the parent did not fail to include a citation. The parenthetical note is that rod cells are so sensitive that they react to being struck by a single photon.
- folli 7y agoThat's actually a very cool fact: https://www.nature.com/news/people-can-sense-single-photons-1.20282 https://www.nature.com/news/people-can-sense-single-photons-...