The light from an object moving tangentially (to your left or right) will exhibit:
A) a blueshift.
B) a redshift.
C) a shift in peak wavelength towards the red.
D) a shift in peak wavelength towards the blue.
E) no shift.
E
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Which of the following stars is the hottest?
A) a blue star B) an orange star C) a yellow star D) a green star E) a red star
A doubly convex thin lens is made of glass with an index of refraction of 1.52. The radii of curvature of the faces of the lens are 60 cm and 72 cm. What is the focal length of the lens?
A) 70 cm B) 63 cm C) 75 cm D) 66 cm E) 58 cm
The Sun's surface seethes and churns with a bubbling pattern. Why?
A) We are seeing hot gas rising and cool gas falling as a result of the convection that occurs beneath the surface. B) The Sun's surface is boiling. C) The churning gas is being stirred up by the strong solar wind. D) The churning is an illusion created by varying radiation; the gas on the Sun's surface is actually quite still.
The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10^?19 C creates an electric current. The radius of the electron orbit is 5.30 × 10^?11 m and the electron's velocity is 2.20 × 10^6 m/s. What is the magnetic field strength at the location of the proton?