The human eye is most sensitive to green light of wavelength 505 nm . experiments have found that when people are kept in a dark room until their eyes adapt to the darkness, a single photon of green light will trigger receptor cells in the rods of the retina.
1.what is the frequency of this photon?
2.how much energy (in joules and ev ) does it deliver to the receptor cells?

1. f = 5.94 x 10^14 Hz

2. 3.94 x 10^-19 J or  2.46 eV

Explanation:

wavelength, λ = 505 nm = 505 x 10^-9 m

speed of light,c = 3 x 10^8 m/s

1. Let the frequency of the light is f.

f = 5.94 x 10^14 Hz

2. Energy is given by

E = h x f

where, h is the Plank's constant.

E = 6.63 x 10^-34 x 5.94 x 10^14

E = 3.94 x 10^-19 J

Now, we know that 1 eV = 1.6 x 10^-19 J

E = 2.46 eV

Explanation:

Explanation: