The index of refraction for red light in water is 1.331 and for blue light is 1.340 . If a ray of white light enters the water at an angle of incidence of 83.00°, what are the underwater angles of refraction for the blue and red components of the light?
47.79° (blue), 48.22° (red)
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A. 0.5 Hz. B. 1 Hz. C. 2 Hz. D. 4 Hz. E. It cannot be determined from the given information.
You observe a star and you want to plot it on an H-R diagram. You will need to measure all of the following, except the star's
A) mass. B) distance. C) apparent brightness. D) spectral type.
The mass of the nucleus is closest to
A. 99% of that in the entire atom B. 1 % of that in the atom c. 10-5 of that in the atom D. 10-15 of that in the atom
Which of the following hypothetical observations would demonstrate that the inflation model was incorrect?
A) The geometry of the universe is curved, not flat. B) The helium abundance in a galaxy is 29%. C) The rate of expansion of the universe has changed over time. D) Stars began to shine only a few hundred million years after the Big Bang.