A silicon monoxide thin film (n = 1.45) of thickness 73.9 nm is applied to a camera lens made of glass (n = 1.55). This will result in destructive interference for reflected light of what wavelength?
a. 571 nm
b. 343 nm
c. 429 nm
d. 311 nm
e. 536 nm
c
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Why do we think tiny quantum ripples should have been present in the very early universe?
A) The shock wave of the Big Bang caused ripples that expanded outward with time. B) The energy released when the strong force froze out of the GUT force caused shock waves that produced ripples in the universe. C) Matter and antimatter particles that spontaneously formed from high-energy photons caused perturbations in the radiation field. D) The annihilation of matter and antimatter particles caused tiny explosions that perturbed the radiation field. E) Quantum mechanics requires that the energy fields at any point in space be continually fluctuating as a result of the uncertainty principle.
On a horizontal frictionless floor, a worker of weight 0.900 kN pushes horizontally with a force of 0.200 kN on a box weighing 1.80 kN. As a result of this push, which statement could be true?
A) The box will not move because the push is less than its weight. B) The worker and box will both have an acceleration of 1.08 m/s2, but in opposite directions. C) The worker and box will both have an acceleration of 2.17 m/s2, but in opposite directions. D) The worker will accelerate at 1.08 m/s2 and the box will accelerate at 2.17 m/s2, but in opposite directions. E) The worker will accelerate at 2.17 m/s2 and the box will accelerate at 1.08 m/s2, but in opposite directions.
Valles Marineris is the most striking example of a(n)
A) scarp. B) shield volcano. C) oceanic trench. D) impact crater. E) rift valley.
When radium-224 emits an alpha particle, the remaining daughter nucleus is which of the following?
a. lead-213 b. actinium-215 c. radon-220 d. bismuth-215