Laser coagulation surgery is used to treat a number of eye diseases, such as age-related macular degeneration and diabetic retinopathy. during the procedure, an argon laser (with principal wavelengths of 514 nm and 488 nm) is used to cauterize ocular blood vessels. the laser light absorbed by the tissue raises its temperature until proteins become coagulated. for the purposes of the following questions, use c = 3.00×108 m/s and h = 4.14×10−15 ev⋅s. what is the photon energy of the 514 photon?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

When you turn on a battery-operated device, an electrical circuit is

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.