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:

answer: (431,2)

step-by-step explanation:

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.