Which one of the following is an accurate statement about light?
A) When light strikes a surface at the critical angle, all the light passes through the surface.
B) When light strikes a surface at the critical angle, only the reflected light is 100% polarized.
C) When light strikes a surface at Brewster's angle, it is completely reflected at the surface.
D) When light strikes a surface at Brewster's angle, only the reflected light is 100% polarized.
E) When light strikes a surface at Brewster's angle, the reflected and transmitted light are both 100% polarized.
D
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Light consisting of a mixture of red and blue light enters a 40°, 70°, 70° prism along a line parallel to the side opposite the 40° vertex. The index of refraction of the prism material for blue light is 1.530,
and for red light it is 1.525. What is the angle between the two emerging beams of light? A) 0.5° B) 0.9° C) 0.1° D) 0.3° E) 0.7°
How does the Sun generate energy today?
A) nuclear fission B) nuclear fusion C) chemical reactions D) gravitational contraction E) gradually expanding in size
Projectile Motion: A projectile is fired from the edge of a cliff as shown in the figure. The initial velocity components are 940 m/s (horizontal) and 96 m/s (vertical). The projectile reaches maximum height at point P and then falls and strikes the ground at point Q. How high is point P above point Q, assuming no air resistance?
A. 470 m B. 490 m C. 45,000 m D. 940 m E. 90,000 m
An ice cube with a small solid steel sphere frozen inside floats in a glass of water filled to the brim. What happens to the level of water in the glass as a result of the ice melting?
a. It goes up, overflowing. b. It stays the same. c. It goes down. d. It depends on air pressure, thus the answer is indeterminate.