The laser in an audio compact disc player uses light with a wavelength of 7.80x10e+2 nm. What is the frequency of this light (in Hz)? What is the energy of a single photon of this light?

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

what does the table look like