Page 39 - WAVES

Skrin Interference of Lights

Dwi-celah Occurs when an incident light wave passes
through a double slit.

Celah x An interference pattern is produced as a result
of the superposition of two emerging light waves
from the double slit.

Sumber Young’s double-slit experiment

cahaya x
 Use monochromatic light (light wave with
only one wavelength)

 The double slit must be very narrow (about
Corak Interferens
0.5 mm) to produce a clear interference

Eksperimen dwicelah Young boleh digunakan pattern because the wavelength of light is
untuk mengukur panjang gelombang sesuatu very small.
sumber cahaya dengan menggunakan  When light from monochromatic source

persamaan: passes through a double slit, two sources of
coherent light are produced.
a = Distance between the two
ax slits on the double slit plate  The interference pattern consists of alternate
bright and dark fringes that can be seen on a
λ = D =Distance between the distant screen.
D double-slit plate and the
screen
λ = The wavelength of light  Bright fringes : Interferens membina
(depends on its color.)  Dark fringes : Interferens memusnah
x = Distance between two
consecutive bright fringes or
dark fringes.
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