In a double-slit experiment, the slit separation is 1.75 mm, and two coherent wavelengths of light, 425 nm and 510 nm, illuminate the slits
At what angle from the centerline on either side of the central maximum will a bright fringe from one pattern first coincide with a bright fringe from the other pattern?
0.0835°
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A 1959 penny has a diameter of 19.55 mm, a thickness of 1.55 mm, and a mass of 2.500 g. What is its density?
A) 5.37 × 103 kg/m3 B) 21.5 × 103 kg/m3 C) 1.34 × 103 kg/m3 D) 2.68 × 103 kg/m3 E) 1.86 × 10-4 kg/m3
As evidence for the cosmic inflation hypothesis, this hypothesis explains
A) the observed "flatness" of the overall three-dimensional universe. B) the origin of the "clumping" of matter and energy that we see today in such aggregations as stars and galaxies. C) Both of the above. D) the force of gravity. E) All of the above.
A student wants to establish a standing wave on a wire 1.8 m long clamped at both ends. The wave speed is 540 m/s. What is the minimum frequency she should apply to set up standing waves?
According to the principle of equivalence in general relativity,
1) space and time are aspects of each other. 2) energy and mass are aspects of each other. 3) electricity and magnetism are aspects of each other. 4) observations made in an accelerating frame are indistinguishable from observations made in a gravitational field. 5) all of the above. Einstein's gravitation theory obeys the principle of correspondence in that it 6) corresponds to a truer description of events in very strong gravitational fields. 7) is a special case of Newton's theory. 8) has been proven in repeated experiments. 9) agrees with the proven results of Newton's theory. 10) cannot distinguish between observations made in an accelerating frame and a gravitational field.