A dark fringe in the diffraction pattern of a single slit is located at an angle of ThetaA = 38°. With the same light, the same dark fringe formed with another single slit is at an angle of thetab= 64. Find the ratio W/Wg of the widths of the two slits.
WA/WB=?

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.