Everything we see or do in everyday life that involves electricity in any way is the result of electrons moving from one place to another, or from one object to another. <em> (last choice)</em>
Destructive interference occurs when path difference = ½-integer
multiple of the wavelength i.e. Minima in diffraction pattern given by,
= ! +
# λ = !1 +
# λ = 3λ/2
m
Answer:
21
Explanation: its actually 20.85 but i guess they round to 21