Light spreads out when it passes through a narrow slit because of __________
Fill in the blank(s) with correct word
diffraction
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Consider again the objects you ranked by distance in Part A. Suppose each object emitted a burst of light right now. Rank the objects from left to right based on the amount of time it would take this light to reach Earth, from longest time to shortest time.
The inverse of Hubble's constant (1/H) gives the approximate ________.
A. magnitude of the cosmic horizon B. density of the Universe C. age of the Universe D. size of the Universe
The angle of reflection is the angle between
A) the reflected ray and the incident ray. B) the reflected ray and the surface of the mirror. C) the incidence ray and the surface of the mirror. D) the reflected ray and the normal drawn at the point where this ray meets the mirror. E) the incident ray and the normal drawn at the point where this ray meets the mirror.
A system consisting of a positively-charged particle and an electric field
a. loses potential difference and kinetic energy when the charged particle moves in the direction of the field. b. loses electric potential energy when the charged particle moves in the direction of the field. c. loses kinetic energy when the charged particle moves in the direction of the field. d. gains electric potential energy when the charged particle moves in the direction of the field. e. gains potential difference and electric potential energy when the charged particle moves in the direction of the field.