A thin uniform film of oil that can be varied in thickness covers a sheet of glass of refractive index 1.52. The refractive index of the oil is 1.64. Light of wavelength 555 nm is shone from air at normal incidence on the film
Starting with no oil on the glass, you gradually increase the thickness of the oil film until the first interference maximum in the reflected light occurs. What is the thickness of the oil film at that instant? A) 139 nm
B) 169 nm
C) 183 nm
D) 84.6 nm
E) 91.3 nm
D
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Kinetic Energy: How many joules of energy are required to accelerate a 1.0-kg rock from rest to a speed of 0.866c? (c = 3.0 × 108 m/s)
A. 1.8 × 1017 J B. 9.0 × 1016 J C. 3.0 × 103 J D. 3.3 × 1016 J
A(n) ____ is 1/60th of a degree
a. precession b. second of arc c. minute of arc d. nadir e. angular diameter
Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled 3 meters apart, the force on each charge will be
A) 0.11 N. B) 0.33 N. C) 0 N. D) 3 N. E) 9 N.
At some point between Earth and the Moon, the forces due to gravity on a space traveler would be the same when this point is
A) nearer Earth. B) nearer the Moon. C) mid-way between Earth and the Moon. D) none of the above