An electron volt, eV, is, in many cases, a more convenient unit of energy to use to describe atomic and molecular phenomena compared to joules. The human eye, for example, can be thought of as a photodetector sensitive to photons with an energy of 2 to 3 electron volts. If a human eye detects colors that have 2.35 eV of energy, what wavelength, in nm, does it have? Hint: 1 eV 1.602x10-19 J (exact)

The photoelectric work function of a metal is the minimum energy (of a photon) needed to eject a single electron from the surface of the metal by irradiating it with a wavelength of light with that minimum energy. For potassium (K), the work function equals 3.669 x 10 19 J (per photon). a) What is the minimum frequency ( v ) of the photon of light required to eject an electron from the surface of potassium metal? [ Select ] sec- b) What is the wavelength of this photon of light? [ Select ] nm c) What part of the electromagnetic spectrum does this photon of light come from? [ Select ]

A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm. What is the final state of the hydrogen atom?

A certain microwave oven delivers 750 watts (J/s) of power to a coffee cup containing 66.6 g of water at 37.5°C. If the wavelength of microwaves in the oven is 9.75 cm, how long does it take, and how many photons must be absorbed, to make the water boil? The specific heat capacity of water is 4.18 J/ °C•g and assume only the water absorbs the energy of the microwaves. S photons

Will an electron transition from n=3 to n=1 produce a higher energy photon than a transition from n=5 to n=1? Explain your reasoning.