Which of the following black holes has the largest event horizon? (Ignore any effects of rotation.)
A) a 5 solar mass black hole
B) a 10 solar mass black hole
C) All black holes have the same size event horizon.
B) a 10 solar mass black hole
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Which forms of light are lower in energy and frequency than the light that our eyes can see?
A) infrared and radio B) ultraviolet and x-rays C) visible light D) infrared and ultraviolet
The Rare Earth Hypothesis suggests that
A) the circumstances that have allowed life on the Earth to appear and develop may be so rare that it is unlikely to have occurred anywhere else B) Earth and life on it were created by some omnipotent being C) the orbits of any Earth-like planets around other stars would have been disrupted by inward migration of Jovian planets D) Earth-like planets are unlikely to have formed around any other stars
When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass:
a. will not change its speed. b. will not change its frequency. c. will not change its wavelength. d. will not change its intensity.
A particle in a box with zero point energy E1= 4.0 eV, undergoes a transition from the third excited state to the second excited state emitting a photon. What is the energy of the photon?
A. 4.0 eV B. 16 eV C. 20 eV D. 28 eV E. 26 eV