(a) a double-slit experiment is set up using red light (l = 701 nm). a first order bright fringe is seen ata given location on a screen. what wavelength of visible light(between 380 nm and 750 nm) would produce a dark fringe at theidentical location on the screen? b) a new experiment is created with the screen at a distance of 2.1m from the slits (with spacing 0.12 mm). what is the distancebetween the second order bright fringe of light with l = 696 nm and the third order bright fringe oflight with l = 407 nm? (give theabsolute value of the smallest possible distance between these twofringes: the distance between bright fringes on the same side ofthe central bright fringe.)

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

Dinate system, and a charge q = - 2.00 nc is placed s2 10 n> c. (a) what is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to es from parallel to perpendicular? (b) at what absolute temperature t is the average translational kinetic energy 32 kt of a molecule equal to the change in potential energy calculated in part(: abovethistemperature,thermalagitationprevents the dipoles from aligning with the electric field.) placed in a uniform electric field e with magnitude 1.6 * 6 on the positive x-axis at x = 4.00 cm. (a) if a third charge q3 = +6.00 nc is now placed at the point x = 4.00 cm, y = 3.00 cm, find the x- and y-components of the total force exerted on this charge by the other two. (b) find the magnitude and direction of figure p21.62 ll uu 21.55 . torque on a dipole. an electric dipole with dipole moment ps is in a uniform external electric field es. (a) find the orientations of the dipole for which the torque on the dipole is zero. (b) which of the orientations in part (a) is stable, and which is unstable? (hint: consider a small rotation away from the equi- librium position and see what happens.) (c) show that for the stable orientation in part (b), the dipole’s own electric field tends to oppose the external field. 21.62 ..

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.