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 substance with a high thermal inertia has a high
A) temperature, in many cases. B) heat conductivity. C) specific heat capacity. D) energy content.
A CD player uses a laser with wavelength 900 nm. If the CD has a plastic coating with index 1.50, what is the wavelength in the plastic?
a. 600 nm c. 1350 nm b. 500 nm d. 750 nm
The center of our galaxy is 30,000 light years away. Could a person possibly travel there in her own lifetime?
A) No, because a person cannot travel at lightspeed. B) No, because the trip would take longer than 30,000 years, and nobody lives this long. C) No, because time dilation applies only to clocks and not to biological phenomena such as a person's lifetime. D) Yes, by traveling at nearly lightspeed, because of time dilation or the "relativity of time." E) Yes, by traveling faster than lightspeed, because of time dilation or the "relativity of time."
The most accurate way to determine the surface temperature of a star is to study
a. the pattern of absorption lines from various atoms. b. the relative intensities of light measured through different photometric filters. c. the peak wavelength of the star's continuum blackbody spectrum. d. pattern of emission lines that are on the star's spectrum.