Which type of electromagnetic wave is invisible, but close to visible light, with wavelengths about the size of a virus or a large molecule (1 raise × 10-8 to 4 × 10-7 . a. gamma rays. . b. ultraviolet rays . . c. microwaves. . d. radio waves. . e. infrared rays

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?