The lasers are made from stacking light waves that add together into a larger wave in a process known as constructive interference. This happens only when waves would meet while they are traveling in the same medium. Constructive interference happens at any part of the medium where two waves moves in the same direction. When these waves would meet, they add up and make a larger wave. It is the interference of at leat two waves which produces a single amplitude where it is equal to the sum of the amplitudes of each wave that interfered. The other type is the destructive intereference where the result is a smaller wave.<span />
Answer:
option "c" is correct
Explanation:
Physical science or Physics is the study of matter, energy and their mutual relationship.
Explanation:
Given that,
2 strings both vibrate at exactly 220 Hz. The frequency of sound wave depends on the tension in the strings.
The tension in one of them is then decreased sightly, then will decrese.
Beat frequency,
So, the new frequency of the string is 217 Hz. Hence, this is the required solution.
Answer:
Explanation:
= Distance between central maxima and first minimum
m = Order = 1
d = Thickness of hair
= Wavelength = 632.8 nm
L = Distance between light source and screen = 1.25 m
Width of central maximum is given by
Distance between central maxima and first minimum is given by
Since is small
The strand of hair is thick.