ii) A monochromatic light of wavelength 5.6 x 10-7
Passes through a double slit and forms 8 fringes of width
0.32cm. If
the screen is 0.7m away from the slit, find the separation of the slits ( 3 mks )
iii) What
is monochromatic light ( 1 mk )
b) A string
vibrates at 25Hz. The speed of the wave on the string is 20ms-1.
Calculate the distance between two
successive
crests ( 2 mks )
c) Explain the term resonance and state:-
i) One hazard caused by the Phenomenon ( 2 mks )
ii) A tube
closed at one end resonates first at 12cm and second at 37cm. Calculate the
frequency of the tuning
fork used given that speed of sound is
330ms-1 ( 3 mks )
ii) What
would be the source of error if only one resonance length was used (
1 mk )
iv) State
two factors that affect the frequency of a vibrating string ( 1 mk )
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