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3. The wavelength of light can be determined 4. In an experiment on the interference of
with a double-slit plate. waves, two loudspeakers are placed at a
distance of 1.5 m from each other. They
are connected to an audio signal generator
to produce coherent sound waves at a
frequency of 0.5 kHz. Calculate
(a) the wavelength of the sound wave if
the speed of sound is 300 ms -1
(b) the distance between two consecutive
soft sounds at a perpendicular
14 mm
distance of 5 m from the source of the
The diagram shows the pattern of sound. a) 0.6 m
interference fringes obtained in a Young’s b) 2 m
double-slit experiment. The separation of
distance of the two slits is 0.25 mm and the
distance between the screen and the
double slit plate is 3.0 m.
Calculate the wavelength of light used in
the experiment.
1.67 x10 m
-7
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