At the second maxima on either side of the central bright spot in a double-slit experiment, light from
A) each opening travels the same distance.
B) one opening travels twice as far as light from the other opening.
C) one opening travels one wavelength of light farther than light from the other opening.
D) one opening travels two wavelengths of light farther than light from the other opening.
D
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A 8.00-kg bowling ball falls from a 3.50-m shelf. Just before hitting the floor, what will be its kinetic energy? (g = 9.80 m/s2 and assume air resistance is negligible)
a. 280 J b. 49.0 J c. 2.86 J d. 274 J e. 28.0 J
The critical angle for an air-glass interface is 29.6°. When a light ray in air is incident on the interface, the reflected ray is 100% polarized. What is the angle of refraction of that ray?
A) 25.1° B) 24.5° C) 25.7° D) 23.9° E) 26.3°
Snell's Law: A light ray in glass arrives at the glass-water interface at an angle of ? = 48° with the normal. The refracted ray in water makes an angle ? = 61° with the normal, as shown in the figure. The index of refraction of water is 1.33. The angle of incidence is now changed to ? = 25°. What is the new angle of refraction ? in the water?
A. 30° B. 56° C. 54° D. 60° E. 62°
The escape velocity needed for an atom in the atmosphere of a planet to escape the gravitational pull of the planet is smaller if:
a) the radius of the planet is smaller b) the planet is farther from the Sun c) the mass of the atom is larger d) the temperature of the gas in the atmosphere is lower e) the mass of the planet is smaller