View the simulation here http://www.wiley.com/college/halliday/0470469080/simula
ID: 1359195 • Letter: V
Question
View the simulation here http://www.wiley.com/college/halliday/0470469080/simulations/sim48/sim48.html
In this simulation the thin strip at the top shows a representation of the bright and dark fringes you would observe on a screen a certain distance away from a single or double slit illuminated by monochromatic light. The graph shows another representation of what you would observe, showing a sketch of the intensity of the light striking a particular part of the screen relative to the intensity of the light striking the center of the screen.
(a) Press the "double slit" button to operate the simulation in double-slit mode. Set the slit width slider to a small value, so you see plenty of bright fringes. The other sliders should be set near the middle of their ranges. If you wanted to decrease the spacing between the bright fringes on the screen, which of the following changes could you make? Select all that apply. Use principles of physics to predict which choices are correct, and then check your predictions using the simulation. Assume the entire apparatus is originally surrounded by air, and that the wavelength set by the slider is the light's wavelength in vacuum.
1.Increase the wavelength of the light.
2.Decrease the wavelength of the light.
3.Move the screen further away from the double slit.
4.Move the screen closer to the double slit.
5.Increase the slit separation.
6.Decrease the slit separation.
7.Increase the slit width.
8.Immerse the entire apparatus in water.
9.Immerse the entire apparatus in cooking oil.
Explanation / Answer
If you wanted to decrease the spacing between the bright fringes on the screen, which of the following changes could you make?
2.Decrease the wavelength of the light.
4.Move the screen closer to the double slit.
7.Increase the slit width.
8.Immerse the entire apparatus in water.
9.Immerse the entire apparatus in cooking oil.
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Question
Interference of Light
Click here to view the simulation, and then answer the questions below.
http://www.wiley.com/college/halliday/0470469080/simulations/sim48/sim48.html
In this simulation the thin strip at the top shows a representation of the bright and dark fringes you would observe on a screen a certain distance away from a single or double slit illuminated by monochromatic light. The graph shows another representation of what you would observe, showing a sketch of the intensity of the light striking a particular part of the screen relative to the intensity of the light striking the center of the screen.
(a) Press the "double slit" button to operate the simulation in double-slit mode. Set the slit width slider to a small value, so you see plenty of bright fringes. The other sliders should be set near the middle of their ranges. If you wanted to decrease the spacing between the bright fringes on the screen, which of the following changes could you make? Select all that apply. Use principles of physics to predict which choices are correct, and then check your predictions using the simulation. Assume the entire apparatus is originally surrounded by air, and that the wavelength set by the slider is the light's wavelength in vacuum.
1.Increase the wavelength of the light.
2.Decrease the wavelength of the light.
3.Move the screen further away from the double slit.
4.Move the screen closer to the double slit.
5.Increase the slit separation.
6.Decrease the slit separation.
7.Increase the slit width.
8.Immerse the entire apparatus in water.
9.Immerse the entire apparatus in cooking oil.
(b) Keeping the simulation in double-slit mode, set the slit width to 0.05 mm so you see many bright fringes on the screen. Now set the slit separation to 2.0 mm.
(i) Counting the central maximum (the brightest fringe) as zero, what should you set the slit width to so the fifth fringe to the left or right of the central maximum vanishes, but all the fringes closer to the central maximum are still visible? Think of how can you change the number of visible fringes, use the simulation to find the answer.
From simulation we can find Its width is 0.40 mm
(ii) From the simulation, what is the ratio of the slit separation to the slit width in this situation?
Slit separation is 2 mm
Slit width is 0.40 mm
ratios is given by 5:1
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