:) Why are two independent sources of Light used to illuminate the two slits in Young's double slit experiment?
A)
The fringe width will increase.
B)
The fringe width will decrease.
C)
No interference pattern will be observed.
D)
The interference pattern will have more contrast.

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.