The middle of the first-order maximum, adjacent to the central bright fringe in a double-slit experiment, corresponds to a point where the optical path length difference from the two slits is equal to:

a) 0.
b) undefined.
c) one wavelength.
d) 1/2 wavelength.
e) 1/4 wavelength.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Describe uniform velocity and variable velocity in short

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good