How much energy (in eV)does a photon of red light (l = 700 nm)have? (h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸ m/s,1 eV = 1.60 x 10^-19 J,and 1 nm = 10^-9m) A)3.11 eV B)2.26 eV C)1.78 eV D)1.24 eV

Question

Quizplus · Accepted Answer

Firstly, we need to convert the wavelength of red light from nanometers to meters:

λ = 700 nm = 700 x 10^-9 m

Next, we can use the equation E = hc/λ to calculate the energy of the photon:

E = hc/λ = (6.63 x 10^-34 J s) x (3.00 x 10^8 m/s) / (700 x 10^-9 m)

E = 2.84 x 10^-19 J

Finally, we can convert this energy from joules to electron volts (eV), using the conversion factor 1 eV = 1.60 x 10^-19 J:

E = 2.84 x 10^-19 J x (1 eV/1.60 x 10^-19 J)

E = 1.78 eV

Therefore, the correct answer is C.

How Much Energy (In EV)does a Photon of Red Light