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Question: An electric discharge causes atomic hydrogen to emit photons with energies of 1.89, 2.55, and 2.86eV. In an experiment these are passed through a 1mm wide slit and then through a diffraction grating that has 5000 rulings per centimeter. The photons then go on and strike a screen 1m away.
a. What are the wavelengths of these photons?
b. Describe what appears on the screen and where. Be quantitative. Also give colors and tell how you know them.
c. Explain why these results suggest that light is a wave?
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.27 cm. How far behind the pinhole should you place the viewing screen
A conveyor belt is used to move sand from one place to another in a factory. The conveyor is tilted at an angle of 13.3° from the horizontal and the sand is moved without slipping at the rate of 6.51 m/s. The sand is collected in a big drum 2.89 m be..
For the Mercury manometer system and conditions shown, determine the gage pressure in psi at points A. B. C, D and E in the system
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vector a points in the negative y direction and has a magnitude of 4 units. vector b has three times the magnitude and
Immediately before collision, the linebacker is slipping with a velocity of 8.6 m/s north and the halfback is sliding with a velocity of 7.4 m/s east.
what is the direction of its velocity relative to the frame of reference.
A 100 g granite cube slides down a 40* frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 200g steel cube at rest. How high above the table must the granite cube be released to give the steel cube a spee..
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Express your reply in terms of the cylinder's radius r and the magnitude of the acceleration because of gravity g.
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assume a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
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