Diffraction Gratings: Which of the following changes would increase the separation between the bright fringes in the diffraction pattern formed by a diffraction grating?
A. Increase the wavelength of the light used.
B. Increase the separation between the slits.
C. Immerse the apparatus in water.
D. All of these.
E. None of these.
Answer: A
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Answer the following statement(s) true (T) or false (F)
Alain Aspect’s experiments support the quantum prediction that superluminal connections do exist between measuring devices, connections which in fact violate the special theory of relativity.
Approximately 90 percent of the mass of the Milky Way is located in the halo of the galaxy in the form of dark matter
Indicate whether the statement is true or false
The oxygen in Earth's atmosphere
a. was manufactured inside stars. b. was added to the atmosphere by plant life. c. has grown more abundant since the origin of Earth. d. was manufactured inside stars, was added to the atmosphere by plant life, and has grown more abundant since the origin of Earth. e. None of the other choices are correct.
Uniform Circular Motion: A car moving at a steady 10 m/s on a level highway encounters a bump that has a circular cross-section with a radius of 30 m. The car maintains its speed over the bump. What is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the top of the bump?
A. 200 N B. 390 N C. 790 N D. 490 N E. 590 N