the eye of the reptile!
Electricity and Magnetism
Level
2
The eyes of certain member of the reptile family pass a single visual signal to the brain when the visual receptors are struck by photons of wavelength 132.6 nm. If a total energy of \(3\times 10^{-14}\) J is required to trip the signal, what is the minimum number of photons that must strike the receptor?
Constants
- Plank's constant, \(h = 6.63\times 10^{-34}\text{ J}\cdot\text{s}.\)
- Speed of light, \(c = 3\times 10^{8}\text{ m/s}.\)
by
Ishita Bhatia