Created by StemPy LabIn a double-slit experiment the slits are apart and the screen is away. The slits are lit at the same time by light of wavelengths and . Which of the following statements are correct?
One or more options are correct. Tick all the correct ones: a wrong option costs marks, and a part-right answer earns part of the marks.
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← Two long, smooth, horizontal metal rails, 0.50 m apart, lie in a uniform vertical magnetic field of 0.80 T. At one end they are joined by an uncharged capacitor of 0.50 F. A metal rod of mass 0.20 kg lies across the rails, as in the figure, and is given a push so that it starts sliding away from the capacitor at 7.0 m/s. No other force acts along the rails. The rod and rails together have a resistance of 2.0 Ω. How much heat is produced in the circuit in all, by the time the current has stopped?A sample starts as a pure radioactive nuclide A, of half-life 6.0 h. Each nucleus of A decays into a nucleus of B, which is itself radioactive, with a half-life of 2.0 h, and decays into a stable nuclide. After how long is the activity of B in the sample greatest? →
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