1. During photosynthesis chlorophyll a absorbs light of 440 nm and emits light of 670 nm.
a) what is the energy in joules of a 440 nm photon?
b) what is the energy in joules of a 670 nm photon?
2. What is the wavelength, nanometers, of a photon that has energy of 6.7 *10^-19 joules?
3. arrange the following in increaing order of energy: radio waves, x-rays, red light from a neon sign, microwaves in your microwave oven, ultraviolet light from a UV lamp.