Question

buttons to make sound Develop your understanding of sound and light waves: Use the and light waves of varying wavelengths. 50 cm 1 ms = 10 Frequency max Amplitude ma LUN O Graph Play Tone © Waves O Particles O Both W Top View Side View Normal O Slow Wave Interference - Waves 1) PHET. 8. Compare the representations of water, sound, and light waves. Describe the similarities and differences with images from the simulation to support your ideas. 9. Experiment to measure the wavelength, height, period, and speed of sound waves. How do your ideas from measuring water waves compare? Describe the similarities and differences with images from the simulation to support your ideas. 10. Experiment to measure the wavelength, height, period, and speed of light waves. How do your ideas from measuring water and sound waves compare? Describe the similarities and differences with images from the simulation to support your ideas. 11. Summarize key ideas that you want to remember about the relationships between water, sound and light waves.

Answer 1

Answers to question 8)

500 nm 1 fs = 10-15 s 0.008 Frequency Amplitude 0 max Graph Electric Field at Center O Screen Electric Field w M 0 500 1000 4000 4500 5000 1500 2000 2500 3000 3500 Position (nm) Normal O Top View Side View Slow

50 cm 1 ms = 10-35 0.008 5 Frequency min max Amplitude 0 max Pressure at Center Graph O Play Tone O Waves O Particles O Both Pressure 50 100 150 200 250 300 350 400 450 500 Position (cm) O Top View O Side View Normal Slow

1 cm 0.00 $ Frequency min max Amplitude 0 max 2 Graph 32 O Top View O Side View II Normal Slow 1) PHET: Waves Interference Slits Diffraction

-the similarities are that all the waves are spreading out from a point, as seen from the images

-the difference seen by the simulation is that, wave and sound requires medium, but not light. as we can see from the images.

--------------------------------------------------------------------------------------------------------------------------------------------------------

Answer to question 9.

50 cm 1 ms = 10-35 Frequency min max Amplitude 0 max 2. = 85.8 cm Pressure at Center Graph O Play Tone O Waves O Particles O Both Pressure 0.00 ms BR 50 100 150 350 400 450 500 200 250 300 Position (cm) Normal O Top View O Side View O Slow )) nce 1) PNET: Waves Interference Slits Diffraction

-we can use the measuring tape given in the simulation and measure the wavelength from the consecutive wave peaks or measuring the distance from the beginning of one wave to the other as show in the figure.

- the height can be measured using the graph given.

-we can can use the stopwatch provided in the simulation and then find the time required for the wave to cross a point. then it will give the period.

- To find the speed, we divide the wavength by the time.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Question 10:

500 nm 1 fs = 10-15 s Frequency 0.00 fs Amplitude 0 max 2 552.1 nm mo Electric Field Graph Screen Electric Field at Center 1 fs Time Electric Field m B2 500 1000 5000 1500 2000 2500 3000 3500 4000 4500 Position (nm) Top View Normal O O Side View Slow ) 1) PHET: Waves Interference Slits Diffraction

500 nm 1 fs = 10-15 s 0.00 Frequency Amplitude 0 max -0 Separation 500 800 nm 4000 O Graph O Screen Intensity Normal Slow ΠΗ 1) PHET: Waves Interference Slits Diffraction

We can use the interference experiment to find the, wavelength, and using the brightness measuring the electric field as given in the simulator we get the height, and using the colour of the light we can get the period and we know speed is constant for light.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Question 11)

water and sound don't require medium, but light requires medium. water and light is a transverse wave. sound is longitudinal wave