question 1)

Two sources are vibrating in phase in a ripple tank experiment. The distance from a point on the third nodal line to source 1 is 3.0 cm; the distance from the same point to source 2 is 9.3 cm. It takes 3.4 s for a wave to travel the 50 cm length of the tank. Determine the frequency of the waves.

question 2)

In an interference pattern between two wave sources, two sources 8.00 mm apart produce waves of wavelength 3.80 mm. The distance from the right bisector to a point, P, on the second nodal line is 18 mm. Determine the distance from the midpoint between the sources to the point P.

question 3)

Calculate the wavelength of light in nm that produces a fifth-order bright fringe at an angle of 3.1 with a slit separation of 62 m.