Page 16 - form 5 physics chapter 1
P. 16
Young’s formula λ = ax a = distance between
two coherent
The relationship D sources
between λ, a, x
and D λ = wavelength
x = distance between
two consecutive
node (or
antinode) lines
D = distance from the
two sources to
the point of
measurement of
x
Factors affecting The interference pattern depend on the value of x
the interference When x changes, the interference pattern also changes
pattern x = λD
a
1. x∝ 1 The distance between 2 consecutive lines, x is
a inversely proportional to the distance between 2
sources,a
As a becomes larger, x As a becomes smaller, x
becomes smaller becomes larger
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