Asingle-slit diffraction pattern is formed on a distant screen.
assuming the angles involved are small, by what factor (need the multiplier only) will the width of the central bright spot on the screen change for the following cases?
(a) the wavelength is doubled.
(b) the slit width is doubled.
(c) the distance from the slit to the screen is doubled.

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.