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? answer in the order indicated. separate your answers with a comma.3.to appreciate what a small amount of energy this is, calculate how fast a typical bacterium of mass 9.50�10? 12 g would move if it had that much energy.

0.0091 m/s

Explanation:

h = Planck's constant =

c = Speed of light =

= Wavelength = 505 nm

m = Mass of bacterium =

Frequency is given by

Freqeuncy is

Energy is given by

Energy is

The above energy is the kinetic energy

The velocity of the bacterium would be 0.0091 m/s

heat the gas and measure the pressure

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me