Page 18 - form 5 physics chapter 1

¾ The interference pattern consists of alternate
bright and dark fringes that can be seen on a

distant screen.
¾ Bright fringes: constructive interference
¾ Dark fringes: destructive interference.

a = Distance between the two slits on the double slit

plate
D = Distance between the double-slit plate and the

screen
λ = The wavelength of light depends on its color.
x = Distance between two consecutive bright fringes

or dark fringes.

λ = ax Occurs when two coherent sound waves interact
on the basis of the principle of superposition to
D produce a pattern of

Interference of Sound
Waves

a= the distance between The two loud speakers are the sources of the two
coherent sound waves as they are connected to
the two loudspeakers the same audio signal generator.
D = Distance between the A student is requested to walk in a straight path at
loudspeakers and the a distance of D from the loudspeakers.
path along which
interference can be The student hears alternating loud and soft
detected sounds as he walks along the straight path.
λ = The wavelength of
sound waves is

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