Physics As Level Waves and Superposition

teo sound waves have frequencies of 250 Hz and 300 Hz. The speed of sound is 340 m/s, What is the difference between the wavelenghts of the two waves?

• 0.23 m

• 1.1 m

• 1.4 m

• 6.8 m

Continuos water waves are diffracted through a gap in a barrier in a ripple tank. Which change will increase the diffraction of the waves?

• increase the frequency of the waves

• increase the width of the gap

• reduce the wavelength of the waves

• reduce the width of the gap

A microphone connected to a c.r.o. is place in front of a loudspeaker. The trace on the screen of the oscilloscope is shown in the image. The time base setting is 0.5 ms/cm. and 0.2mV/cm is the y-axis of the screen. What is the pitch and loudness of the sound?

Ech of the principal radiation of the electromagnetic spectrum has a range of wavelengths. Which of the wavelengths in the image is correctly link to its radiation

• A

• B

• C

• D

Which option correctly displays the wavelengths for the electromagnetic waves

• A

• B

• C

• D

A source of sound of frequency 1000 Hz moves away from the stationary observer at a speed of 30 m/s. the speed of sound is 330 m/s. What is the frequency of sounnd heard by the observer

• 909 Hz

• 917 Hz

• 1090 Hz

• 1100

Considering the Doppler effect, When a car is travelling at a constant velocity, passes a stationary observer, the observer hears a change in frequency of the sound emmited by the car. Which statement is correct?

• the change in frequency is greater as the car moves away

• the greater the speed of the car, the greater the change in observed frequency

• The observed frequency is lower as the car moves towards the observer

• the volume of sound heard by the observer does not change

A hill separates a TV Trasnmitter from a house. The trasnmitter cannot be seen from the house. However the house has good TV Reception. By which wave effect at the hill, could the TV signal reach the house?

• Superposition

• diffraction

• interference

• reflection

Ships have been damaged by water waves with large amplitudes-These waves could have been formed by adding the displacements of smaller waves- Which term describes this phenomenon

• diffraction

• polarisation

• Refraction

• superposition

A vibrating rod makes water ripple in a tank. Th graph shows the displacemnt of the wave at one instant as it travels awat from the rod. The wave speed is 2.0 cm/s. What is the frequency of the wave

• 0.8 Hz

• 1.6 Hz

• 2.5 Hz

• 5.0 Hz