Question

What is the energy of a photon of light having a wavelength of 4.5 x 10-7 meters? (Planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)



2.9817 x 10-40 joules



4.4143 x 10-19 joules



6.6745 x 10-26 joules second



9.9456 x 10-49 joules



19.864 x 10-26 joules/second

Answer 1

E=hv
E is for energy, h is plank's constant, and v is frequency of the em radiation

Answer 2

And \[\nu=\frac{ c }{ lambda }\]

Answer 3

where lambda is wavelength and c is the speed of em radiation