Threshold frequency for the photoelectric effect on lithium (f=2.93 eV) is _______________. If the the wavelength of the incident light is 380 nm, the stopping potential is _________________.
【单选题】根据下面材料,回答题。 Shopping at Second-hand Clothing Stores When 33-year-old Pete Barth was in college, shopping at second-hand clothing stores was just something he did-"like changing the tires on his car." ...