Answer:
OLTO 3 Suppose the two glass plates in Figure are two microscope slides 10cm long. At one end they are in contact; at the other end they are separated by apiece of paper 0.02mm thick. What is the spacing of the interference fringes seen by reflection? Is the fringe at the line of contact bright or dark? Assume monochromatic light with a wavelength in air of lambda=lambdao=500nm. lo=500 nm = 0.0200 mm - 10.0 cm (15.05)) 4. Using the experimental apparatus shown in Figure, when ultraviolet light with a wavelength of 240 nm shines on a particular metal plate, electrons are emitted from plate 1, crossing the gap to plate 2 and causing a current to flow through the wire connecting the two plates. The battery voltage is gradually increased until the current in the ammeter drops to zero, at which point the battery voltage is 1.40 V. (a) What is the energy of the photons in the beam of light, in eV? (b) What is the maximum kinetic energy of the emitted electrons, in eV? (C) What is the work function of the metal, in eV? plate 2 AV incident electrons Tammeter light plate 1 (15.05) Powered by WPS Office